NFC

coolestyouthpastor

Yes you can use the Bolt card with the Coincorner app. But you can also use the Bolt Card without using the Coincorner app. You are able to use the Bolt Card, or any other other NFC card, in a self-custodial manner using your own node.

Seisouhen

Are there NFC capable lightning wallets, like just tap and pay?

Whole_Visible

Understandable to focus on fiat. People generally don't pay with crypto. Maybe buying VPNs and seedboxes have an alright portion of people paying with crypto. Regardless payments is a tough industry to break into. Crypto may be their best differentiator if they can break through with a Twitter pay. There's crypto payment services like BitPay, Flexa, etc but overall I rarely see them. I remember Amazon Pay buttons being an option on a limited amount of non-Amazon websites like a decade ago. I don't recall seeing it in a long time. Apple Pay and Google Pay solid for NFC credit card payments, don't regularly see them on online websites. Paypal everywhere though. Need integrations with Square point of sale and Stripes offerings

Gettingby74

NFC and AFC Championship games

s0msone

Why we still using qr code instead of NFC like every other payment method?

scheistermeister

Yes: https://offline.cash It’s a private key (multisig) embedded in an NFC chip on the banknote. Pretty cool.

bitrequest

This is an old clip, currently also supports lightning and Boltcard NFC payments. Check out [bitrequest.io](https://bitrequest.io) and start accepting crypto. Let's go!

kellymcpherson

[Arculus](https://www.getarculus.com/products/cold-storage-wallet/?gclid=Cj0KCQiA_bieBhDSARIsADU4zLdY0wZeNgi4clxmwSNfGqET9041GlErfYvei67UtxKd1Y7biHJPN0IaAsOIEALw_wcB&gclsrc=aw.ds) for convenience, ease, and day to day stuff. [Coldcard](https://coldcard.com/) for your hodl stash, used with [BlueWallet](https://bluewallet.io/) app. I use both of these with just an android phone. No computer necessary. **Arculus pros:** - 3FA. It needs biometrics, a 6 digit pin, & the physical arculus card which is basically a debit/credit card looking thing with NFC. You need all 3 to do a transaction. - No wires, no charging, no bulky hardware, just the card with the Arculus app. - Really convienent & easy to use vs other hardware wallets. **Arculus Cons:** - Can only currently do 12 word seed phrases and does not currently support passphrases. In the future they said they are planning to implement 24 word seed phrases but nothing said about passphrase implementation. - high spreads and fees if you're buying/selling in the app. Just stick to buying elsewhere and transferring in. ‐ Since there is no screen on the card, your seed phrase shows right on the device during set up. However, you can run your phone in airplane mode during set up and the Arculus app does not allow mirroring or screenshots during this, so according to Arculus, any potentional hackers/spyware can not mirror or capture your screen while your setting it up (or to record and send to hackers after you reconnect) if you are truly in airplane mode (wifi off, data off, etc). If you are paranoid your phone might have spyware then it's best to set it up on a new device that has not had apps transferred over from old. When going to confirm the words when creating a new wallet you do not have to type it in, you just tap the words on the screen to confirm you wrote down your seed words correctly. However, if you lose your phone or card and have to do a restore wallet, you currently do have to type in your seed words. I actually had to restore my wallet once. I felt uncomfortable about actually typing in the seed phrase even in airplane mode so I switched everything over to a new seed after using 2 devices. Basically I love Arculus for the ease/convenience and 3FA, but don't feel comfortable enough with that seed on screen portion part to have it as a HODL solution. But I think it's safe enough for day to day use with smaller amounts. **Coldcard pros:** - bitcoin only so less attack vectors - can be used completely air-gapped with a SD card - has a duress pin option & brick me pin option for extra security in case of wrench attack - has an option for multi-sig - comes in a tamper evident bag where you enter the bag number it's in on the Coldcard to verify it has not been taken out of the bag. - allows 12-24 word seed phrases - allows option for a passphrase - allows you to verify the transaction on the Coldcard to make sure it's correct and I heard it has some way of detecting if the "change" address gets changed to a different address other than the wallets. **Coldcard cons:** - steep learning curve - no specific app for it, you have to find the program that works for your setup. (I use Bluewallet on an android) - a lot of tutorials for watch only wallet programs are usually made by random people and not always super clear in instructions and can be outdated. So if you're not at least a little tech savvy you might run into some issues. - air gapped isn't as simple, .psbt made things more complicated - more time/effort to do send transactions - have to have Coldcard plugged into a power source of sort - SD card & USB c cable/charging port sold separately - if using a phone without an SD card slot you'll need to buy a SD card to USB-C adaptor (or whatever charging type your phone is). Also worth noting is some adaptors you have to take off your screen case at least some because it blocks the adaptor from plugging in otherwise. - have to learn about deveration paths to make sure you're sending to the correct address in certain instances. - there's always a chance that the wallet program you are using to create the .psbt files is compromised and has the possibility of showing you the correct address on the interface while inputting whatever it wants on the actual psbt file, but again you are verifying this info on the Coldcard it's self and also which has the change address check. - kind of expensive compared to some other hardware wallets, but this shouldn't matter as much if you're using this to HODL your stash. Keeping it safe is #1! TL;DR: Basically I bought Arculus to start, then bought Coldcard for peace of mind. I think both have their place and I'm glad I have both over just 1. Arculus wins in convienence and easiness, Coldcard wins in security.

looneytones8

Loans are the only use for banks on a BTC standard. ATMs are unnecessary. NFC cards can already do tap-to-pay Bitcoin today. You can send Bitcoin to anyone in the world instantly, who the fuck needs a wire transfer?

TechHonie

Some asshole was just wandering around EMPing everybody and then my fucking NFC chip doesn't work and now I'm starving to death God I can't believe I signed up for this stupid social credit system.

Socialists-Suck

You won’t need it due to the Government’s citizen NFC chip imbedded in your body.

cyger

I may give a try, some key features from the [Blog ](https://blog.1inch.io/introducing-the-1inch-hardware-wallet-47e2a2a8d5a0) > The device is fully air-gapped, as it has no buttons and does not require any wired connection. All data is exchanged using QR codes or, optionally, with NFC. Users can take advantage of transparent transaction signing, as opposed to blind signing offered by some other devices. To prevent hacker attacks and theft of funds, full transaction parsing and call data offline analysis is done. If a transaction a user is signing gets compromised on the web or in the mobile app, the device will immediately inform the user about that. Also, the 1inch Hardware Wallet enables users to create and control several sets of wallets with different seed phrases. Each wallet uses the Hierarchical Deterministic (HD) Wallet algorithm in accordance with BIP44 to create a new wallet set. At first use, a maximum number of wallets is randomly generated, and no one knows how many of them there are, except for the device’s owner. Meanwhile, different pin codes provide access to different sets of wallets, closing the market security gap.

coinfeeds-bot

tldr; The 1inch Network (1INCH/USD) has unveiled its hardware wallet, which is expected to cost somewhere between $179 and $199. The wallet comes in the size of a bank card, weighs just 70 grams and is 4mm thin. It has a 2.7” E-Ink grayscale touch display and a Gorilla Glass 6 surface and stainless-steel frame. Users will use QR codes or NFC to exchange data. *This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.*

bojack-horsey

sounds a bit gimmicky? why not allow wired connections in addition to the NFC/QR options? but it's good if there's more competition on the market i guess

interwebzdotnet

This sounds pretty cool. No buttons, no hard wire connections. All runs on NFC and QR codes. Major concern for me would be the security of a new wallet platform.

SnooRecipes1908

Socios has partnerships with both Lega Serie A and several Italian top-flight clubs to offer fan tokens, while parent company Chiliz launched GameUsed, an end-to-end authentication service for sports memorabilia earlier this year. This initiative showcases both of these initiatives. The GameUsed NFC chip will allow any smartphone to verify the item and to watch the goal that was scored with the ball. The ‘goal balls’ will only be available to Inter and AC Milan token holders via Socios’ online platform via a reverse auction. lots of pictures in the article

coinfeeds-bot

tldr; Serie A has partnered with Socios to offer fans of AC Milan and Inter Milan the chance to win blockchain authenticated ‘goal balls’ from the Supercoppa Italiana clash between the Serie A and Coppa Italia champions. The match balls used to score goals will be verified on Socios’ GameUsed website and embedded with near field communication (NFC) chip. The NFC chip will allow any smartphone to verify the item and to watch the *This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.*

nvnehi

It should be obvious. If Amazon took crypto payments, and there’s a small percentage drop then they’ve lost a tremendous amount of value, and such a thing could begin a chain reaction which causes irrecoverable damage. There’s a lot holding crypto back but, it makes perfect sense why larger companies are going to be the last to accept it as a payment because they have bills now whereas smaller companies can afford to be risky with their investments. It’s a slow journey because things that last take time. Things usually die as fast as they are built. The world isn’t yet ready for a complete crypto takeover because there aren’t enough systems in place to support it, and there hasn’t been enough time for everyone to use it nor does everyone have access to a device at all times in the way they do their local currency. Crypto requires a fully online world, and while we may seem close, we are no where near close. We still need reliable internet service everywhere, and things like NFC to take over completely. We need other foundational systems to grab hold first as well, or else we risk blowing our one chance at revolutionizing the world’s financial systems. Buy now, be patient, and, hopefully, within one, or two decades it will pay off.

Elean0rZ

So the issue here is that you're incorrect, which gets back to my question about whether you may simply not understand crypto--and I really am not intending to be mean in saying that. You said: >an exchange or web wallet is the same as a bank when it comes to processing transactions it's just not insured A **centralized, custodial exchange** is, indeed, roughly analogous to a bank, and many are, indeed, uninsured. No issues there. But a **web wallet**, in the context of cold storage, is nothing at all like a bank. It's not custodial. It's simply an interface onto the blockchain--no more of a "third party" than the telephone you might use to call your gold courier. (And we haven't even touched on **decentralized exchanges**, which are also non-custodial.) So, no, sending crypto directly to another person and sending gold via a courier are NOT the same thing when it comes to third-party involvement. Neither is exchanging crypto, provided you avoid CEXs. More generally, while it's technically possible to use a thumb drive for cold storage, doing so is a bad idea and no knowledgeable person would do it. So whatever scenarios you're imagining regarding thumb drives and inconvenience are edge-cases that are unrepresentative of the actual experience of transacting with assets that are in cold storage--which, as I've noted, is typically not at all inconvenient. To your point about a world with "failing systems", clearly if we came to the point where no forms of communication over distance existed anymore (internet, radio, whatever) then (1) the world be pretty much fucked anyway due to whatever caused that level of devastation, and (2) yes, tangible assets like gold would definitely be more useful. But that also feels like rather an extreme edge-case, and considering that most people use what amounts to virtual Fiat money (i.e., card transactions, NFC on the phone, etc), nearly everyone on the planet would fall into the "us guys" category you alluded to in your other comment--not just those using crypto. But just so we're clear for the sake of argument, crypto works over basically any kind of communications network--including, say, [amateur radio](https://news.bitcoin.com/no-internet-no-problem-how-to-send-bitcoin-by-amateur-radio/)\--so the threshold of global fucked-ness for it to stop working is rather high. The material point is that, in the world we live in, and in pretty much any world short of the post-apocalyptic one you've imagined, it's faster, cheaper, and easier to send crypto to another person than it is to send gold, at any distance greater than you can walk in, say, a few minutes. That is NOT to say that, therefore, crypto is "better" or "worth more" or anything else. I have nothing against precious metals, I'm not a crypto maximalist by any stretch of the imagination, and I'm not arguing for a second that precious metals aren't established, reliable investment vehicles. I'm also not arguing for a second that crypto doesn't have serious flaws, or that it's guaranteed to succeed in the long run. In short, I'm not one of the "us guys" you refer to. But, whatever one's opinion might be about crypto and its long-term legitimacy, it's an objective fact that in nearly every practical scenario you can imagine, it's easier to send from A to B than a precious metal.

Raphman90

Tons of people have NFC sniffing devices and the like.

tails_42

What's the issue with NFC?

Raphman90

The other thing about the mk4 I don't like is the NFC. If you do use it consider permanently disabling it

7ivor

Coldcard mk4 by Coinkite. It lets you operate fully airgapped so the device is never plugged into a computer, and has a bunch of security features like various trick pins. The new version has NFC for easier use with a phone, but if you don't like that feature you can disable it in the software OR scratch a circuit on the back to permanently disable it physically to remove the potential attack vector.

Raphman90

You can get wallets easily from manufacturers lol, it's notike people only shop on Amazon. If you want an off the shelf solution then I recommend https://coldcard.com/ You might want to destroy the dumb NFC stuff

Raphman90

An air gapped laptop is a solid choice, just make sure it always stays that way. [seed signer is cool too](https://seedsigner.com/) if you can find a pi 0 [krux](https://selfcustody.github.io/krux/) is also an interesting thing, but it's stateless, meaning you have to enter your words in each time you want to send. [coldcard](https://coldcard.com/) is a good off the shelf consumer ready air gapped wakey, but they made some strange choices like adding NFC (that you can physically destroy)

Siccors

QR codes which upload their location? Or which are incorruptible? How? You could just copy a QR code. NFC chips are better, but then the next question is directly what the blockchain adds. Lets start with some realism: How are you going to determine the QR code (or better the NFC chip) is correct? You download the app from the manufacturer. So there we have the first trust. And that makes sense. Who decides if the wine is real or not? The manufacturer decides that. Yet another point of trust. Who decides if the truck was frozen? The temperature sensor. Yet another point of trust. Lets imagine a somewhat realistic scenario. The cooling system of the frozen chicken truck fails. What do you consider a more realistic issue? The company owning the truck in hindsight edits the temperature data in a database. Or the company just uploads fake data in the first place. Or the truck driver puts a bag of ice on the sensor and is done with it. Your blockchain idea only solves one of those three issues. Which is easily solved by just having the sensor digitally sign the data it outputs. Want them to not be able to delete part of the data? Have the sensor make its own little Merkle tree of the data. Now they cannot alter the data without having compromised the private key o the sensor. So yes, you need to trust the sensor. But you anyway need to trust the sensor, if you don't trust the temperature sensor, you got nothing. I can continue longer with this, but in the end it comes down to: 1. You don't need consensus, you are not going to double spend your temperature / location data. 2. You anyway need to trust the true eg temperature data is put on the blockchain. 3. They are centralized problems. If eg your wine is real, is up to the (real) wine manufacturer. And last but not least, which actual problem are you solving here? How often have you had chicken gone bad, but which was hidden because the trucking company hacked the database which stores the temperature?

CoinCornerMSW

The Bolt Card is for lightning transactions, so it can only be used with merchants which [accept Bitcoin](https://www.coincorner.com/checkout) payments and are using an NFC-enabled device/wallet. A UK/Europe version of Fold would be epic though. We'll see what we can do. I'm a sucker for satsback.

9htranger

1. I can send $$ to anyone from my phone within seconds(p2p). Faster using NFC 2. Everyone has a bank account, so there already is mass adoption. 3. Your $$ is insured 4. Most people couldn't care less about defi, and why should they. 5. Contrary to beleif, botcpin is not deflationary Thats just a few things that come to mind. XRP as utility for banking, but i believe their growth will primarily come after the lawsuit when ripple releases their IPO.

Future-Spirit7874

Seems like this is just adding more attack vectors. I also wouldn't put any trust in CZ's statement that 99% of people self custoding will lose their BTC. CZ profits from holding your Bitcoin on his exchange. I wouldn't trust him because he has a vested intrest in getting your BTC on to his exchange and in his pocket. Couple of questions. 1 - Why does it support shitcoins? 2 - Are you sending your seed phrase to the company or is the company creating a seed phrase for you? Doesn't this also mean the company will have your seed phrase? 3 - Can the company create duplicate NFC cards? How do we know they didn't?

smedley_f_butler

Key storage is probably the most important open problem in Bitcoin land. This is an interesting solution, but it doesn’t quite solve the problem I think. What if you lose (some of) the NFC cards?

ThisIsRickiculous

I'm not sure that there are any off-line password managers. The problem is not being offline, the problem is where the servers are and who has access to them, which brings me back to Brave, it create a peer to peer network secured with 24 words (only you know which encrypt) all your data that are stored on your devises, all you deen is 2 or more devices on the sync chain. Yeap, Yubico 5c NFC is the one i got, can way to try it out. I'm new to it so i'll have some exploring to do.

LNCrizzo

Strike Commerce Update Yo. Today, I’m excited to share an update around the partnerships I announced at Bitcoin 2022. There’s been a lot of anticipation and excitement around our announcement, which has been amazing to see, and I wanted to give the community a transparent update. I’ve always believed in building in the open and in collaboration with the community. Part of that is being transparent about our progress, where we do well, and where we can do better. At Strike, our mission is to build a more financially connected world. We accomplish this by making Bitcoin and the Lightning Network easily accessible and usable. Around a year ago we launched the Strike API. A product built to enable marketplaces, merchants, businesses, developers, and more, to offer faster, cheaper, global payments to anyone, at any time​​ — improving financial access and enhancing financial experiences for everyone in the world. Earlier this year, at Bitcoin 2022, I announced a series of partnerships that have the potential to completely redefine retail payments. We announced upcoming integrations with Shopify, Blackhawk and NCR, enabling merchants to accept payments over the Lightning Network. Along with that we shared our vision for what partnering with these companies would allow us to do. That vision is real, but my timeline was off. Everyone who knows me knows my ambition has no boundaries when it comes to pushing Bitcoin and Lightning forward. However, a myriad of factors required me to reassess the timeline I communicated at Bitcoin 2022. In hindsight I was admittedly a bit naive, too excited, and lacked the knowledge that I have now. I admit and own that, 100%. These partnerships and developments are huge and they’re simply going to take a bit longer than I initially thought. First, integrating with third parties often comes with unforeseen technical challenges that are hard to predict. More specifically, integrating a new open payment rail into legacy financial infrastructure adds a whole layer of additional complexity. Second, integrating simultaneously with many different platforms is an immense technical challenge. Third, our ambition and excitement got the best of me and led to what was, in hindsight, a premature announcement. Ultimately, all of these reasons led to delays in our initial timeline. Just a few short years ago, using the Lighting Network with real money was merely a nascent concept and Strike didn’t even exist. If you would have told me then that the biggest payment companies in the world would be working with Strike and the Bitcoin community on using the Lightning Network I wouldn’t have believed you. So while we’re disappointed that we weren’t able to deliver in the timeline we originally set, we’re incredibly proud of the progress that we’ve made and we have some exciting updates. Shopify Our Shopify plugin has been tested and used by enough merchants to be listed on the Shopify marketplace! This is expected to be publicly available in Q1. However, both Shopify and Strike agree, a plugin alone does not maximize the potential of a fast, cheap, global payment rail. The user experience will be greatly improved in many ways. We’ve learned so much in working with Shopify and speaking with customers and we’re hopeful we can keep improving the ability to process cheaper, faster, global payments for merchants. Blackhawk Blackhawk is a privately held business that operates in the prepaid, gift card, and payments industries. Blackhawk offers retailers an alternative payments rail, as opposed to a card network like Visa, to accept Show-To-Pay digital payments from consumers (one of the most popular show-to-pay experiences is your Starbucks application). Blackhawk has partnerships with wallets such as PayPal, Venmo, Klarna, AliPay, WeChat, Moocho, and now Strike! Our integration with Blackhawk differs from all of their existing partnerships in one small yet powerful way: Blackhawk didn’t integrate the Strike network, Blackhawk integrated the Lightning Network. Like all of our integrations, this allows all Lightning Network wallets to checkout at Blackhawk enabled merchants. That means all Blackhawk enabled merchants can also accept payments from anyone on the Lightning Network! The power here lives in the choice it gives the consumer, the open network effect it gives to the merchants, and the cost, speed, and finality benefits it gives to all. If you are a consumer and want to conduct commerce in private you are free to do so, if you want to use custodial solutions, more power to you, the choice is yours. If you’re a merchant and you’re looking to accept cheaper, faster, cash-final payments from a growing set of platforms such as the Cash App, it only takes integrating one network. We’re currently in our final testing phase and are expected to launch with our first merchant early next year at 50 locations. When live, we’ll announce more details. More to come. NCR We’re incredibly excited about the potential of integrating Strike on NCR which will give us access to one of the largest networks of merchants for in-person payments. The latest is that we’re working diligently to make this a reality and we expect to have an update in the near future. I have more to share here, and I will when I can :) How Do These Integrations Work? I’ve seen lots of questions and confusion about the inner workings and functionality of these integrations. Is this just an overdressed PayPal 2.0? Can only Strike users use these new partnerships? Well, you can think of merchants using Lightning very similar to how merchants use a card network like Visa. I know that may be confusing to read for some, but give me a second. Ultimately, merchants use the Visa Network to accept money from customers. Does a merchant’s integration with Visa only work with a specific bank? Is PayPal the only app that can check out at a merchant? No, of course not. Any card that speaks the Visa Network is accepted. No matter what the customer uses, if it correctly follows the Visa protocol, it works, and the merchant receives their local currency. Same goes for our Lightning Network integrations. Our integrations are NOT only for Strike wallets. The QR codes, NFC readers, and whatever other mediums we use to process payments are all open, interoperable, Lightning Network payments. Anybody using any wallet can pay our partners with whatever wallet they choose. In fact, this is a far superior consumer experience because the consumer has the ultimate choice over their commerce experience. The Lightning Network is true free market competition, inclusive to all, offers privacy enhancements over legacy technology, naturally suppresses prices, and drives innovation! What if you’re the biggest bank in the world? Can you check out at our integrated partners? Sure, you just need to be able to make Lightning payments. What if you’re a high-school privacy advocate that built a Lightning wallet with TOR support? Sure, just build the ability to make Lightning payments. To put it clear and simple: If you can make a Lightning payment you are integrated with our partners. You can get a feel for the open network experience by going to strike.me/hrf/ and making a donation. Any Lightning wallet in the world can donate to HRF at strike.me/hrf/! Anyone can pay with any wallet they’d like, and HRF gets instant, cash-final US dollars for no fees, without needing to account for bitcoin or take on bitcoin’s volatility. Same goes for all of our partners. Thanks Thank you. I appreciate the support and the criticism, equally. I appreciate this community, always. To be overly candid with you guys, it’s even hard for me to watch my own presentations and interviews sometimes. I’m a young founder, more people pay attention to Bitcoin and Lightning than ever before, we’re still so early, and we’re building in the open. I can certainly be overzealous at times, have made many mistakes in my career, and I’m sure I’ll make some more before it’s all said and done. With that said, I’ve never been more excited about the work we’re all doing and more confident in the future of Bitcoin, Lightning, and Strike. I mean, Morgan Stanley wrote a report about how Lightning is better than Visa. That’s fucking nuts. Thanks for all the support and continued feedback. Bitcoin has no heroes. I hope to make the community proud of all the progress we’re collectively making. 2023 is poised to be a big year for the builders. But if I’ve learned anything, we’ll just have to wait and see! Much love, Bitcoin ❤️

thejamesbondy

Mr Trump, i see you've made some earnings on your latest NFC collection. That' s cool and all but i got a better business proposal for you sir. THE WALL NFT COLLECTION The pitch is simple. First we mint some NFT WALLS tying them to a real wall in your piece of resistance state of the art, Mar-al-lago resort. After phase 1 we begin phase 2: BRING DOWN THOSE WALLS NFT COLLECTION What do we do now? We break that wall and the debris pieces are now memorabilia. We tie those to the NFT'S, then ship to buyers. Obviously there's a hefty shipping fee. I will be waiting for your contact, Mr Trump.

MrWhiteSnoopDogg

So anyone with a NFC reader can steal my sats? Just wondering, I am curious about if there’s any safety configuration.

CallingVoid

I could see this being used with a cap, like NFC cards in Europe which can be used without a pin for purchases under €50 or whatever. I'm sure it could be easily limited. Only an idiot is going to link this to their entire stack lol.

DatBuridansAss

I mean yeah criminals can attack anyone for any reason, but if this device can spend BTC with NFC alone, it's a pretty conspicuous target, like walking around with a wad of cash in your hand.

xristiano

Jade and Seedsigner will allow you to make PSBTs with QR codes—Bluewallet or Nunchuck. Coldcard can do PSBTs with NFC and Nunchuck, or you can send the text PSBT to Bluewallet. Ledger nano x has bluetooth support with Ledger live. They all work fine.

BashCo

If you go the phone route, you'll need to acknowledge that your solution doesn't qualify as cold storage. At best, it's a sort of air-gapped hot wallet although that's up for debate. You should look for a device that has Bluetooth or NFC and supports signing PSBTs (partially signed bitcoin transactions). Ledger and the latest Trezors might support this, but I don't know for sure. Don't store too much wealth in such a configuration.

whitslack

Well, yeah. This video is basically a tutorial on how to write a URL to an NFC tag. It works, but of course it does.

errlru

Yo, I use NFC proximity sensor. Who tf uses checks? Why not compare it to early Mezopotamia commodity trading?

jelcyn89

NFC kind of image that is mainted by an artificial intelligence and this computer

TeKillaSunRise

Perfectly fine if you don't store whole coins on it. I have half a dozen smartphones lying around - Pixels, Google Huaweis etc. On every single one there's a wallet like Muun, Satoshi's or Relai and on every single one there's a few mio sats. Not one has a sim card and WiFi, NFC etc. is off. If I want to move around sats I simply connect them to my Bitbox or move it to my node first. I honestly don't get this paranoia about using multisig, airgap proof nonsense. Nobody knows I own btc, 95% of the population don't even now what a sw wallet is or how to access it and a burglar couldn't do anything w/o the seed words. The smartphones are like keys to a vault where nobody knows about the location. Absolutely safe.

coinfeeds-bot

tldr; Cypherock has raised $1 million in seed funding to build a self-custody crypto wallet. The company's X1 hardware wallet uses NFC cards to store users' private keys and a seed phrase. Users can view the seed phrase by tapping an NFC card and entering a PIN number, enabling access to transfer funds to another wallet. *This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.*

HashMeOutside_

This won’t go too far. There are several fail points with NFC. Easily copied in close proximity by the right person with the know how.

nutcase2019

Are they slipping those microscopic NFC chips in your bills yet?

icepixie11

While it's clear to anyone paying attention to the category that hardware wallet design has to date been mostly by geeks for geeks, too much friction for newbies, there are a lot of new entrants to the market that are actively addressing this. While the meme iis pretty funny when you think of what legacy hardware wallets have been like in all their USB-shaped glory, there are some really secure NFC-only cold-storage options, no ports at all, with touchscreens you can swipe and tap.

TheMeatery

"CoinCorner released the Bolt Card, a contactless NFC card that works similar to the tap function for Visa, but on the Bitcoin Lightning Network." [https://bitcoinmagazine.com/business/coincorner-releases-the-bolt-card-for-bitcoin](https://bitcoinmagazine.com/business/coincorner-releases-the-bolt-card-for-bitcoin)

FldLima

It's happening guys. Future is now! No more cash notes for sex, just zip a NFC chip on your scholong and be done with it.

coinfeeds-bot

tldr; An IT professional in Switzerland has surgically implanted an NFC chip into his hand to use Bitcoin's Lightning Network. The chip allows him to make Lightning Network payments simply by holding his hand near a compatible NFC reader. While the implant is medically safe, it is not as secure as a Bolt Card and should only be used for Lightning Network withdrawals. *This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.*

AAAdamKK

As cool as this is, I don't think I'd ever want an NFC card that can spend my bitcoin this easily. What if it's stolen? What if the merchant is running corrupt pos software that says 'Pay $2' but actually charges $200? For me NFC on mobile with verification on the spender's side makes more sense in a system that has no chargebacks.

Shield4SI

Hot wallet vs. cold wallet is what you need to do some research on. A hot wallet is a crypto wallet that is on a device connected to or that has access to the internet. Being connected to the internet increases the attack surface a hacker can use. A cold wallet is generally a dedicated device that doesn't connect directly to the internet. This, combined with other security features, helps protect your seed phrase and crypto. Some cold wallets connect directly to a computer in order to sign transactions. Other methods cold wallets may use to sign transactions include QR codes, SD cards, or NFC. There's pros and cons to different cold storage devices, but the most important thing is to use one and start learning. Finally, where most seem to go wrong is with the seed phrase. These 12, 24, or even 25 words (if you use a passphrase) allow anyone in the world access to your crypto. Treat these words like a Top Secret document in a movie. Write your words down on paper and eventually something more durable. Next, transfer a small amount to your cold wallet as a test. Then wipe your cold wallet and recover it. This confirms your seed phrase works and will teach you how to recover a wallet. Lastly, secure it away somewhere safe and your g2g. Social media loves to use the word hack! When I see stories and posts screaming, "I've had my crypto hacked," they are generally wrong. They may have had malware or viruses on their computer that compromised their seed phrase in some way. Social engineering is another common way to gain access as well. A cold wallet will protect against common attacks by isolating your seed phrase, allowing you to stop checking your wallet and worrying.

22Simon22

Hello NPC 🤗 I’m an NFC !!

coinfeeds-bot

tldr; Coinkite has released the SATSCARD, an NFC card that can be used to swap Bitcoin off-chain. The NFC card is designed to work with your mobile phone and is a novel evolution on the Opendime, a USB device that acted as a Bitcoin barer instrument. It has 10X more one-time-use private keys than the OpEndime, which is only unsealable once. *This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.*

coincorner-support

We have the Bolt Card, which is a contactless [bitcoin lightning card](https://www.coincorner.com/TheBoltCard) that can be set up as a gift card. You can put some sats on there from your CoinCorner account if you have one, or can be set up from somewhere like LNbits as explained from 12:25 onwards in [this video](https://www.youtube.com/watch?v=vNX2xwvh8SQ) from BTCSessions. The recipient can then sweep the sats into their wallet using NFC or use to tap-and-pay at accepting merchants. The card can be re-used as many as you want. Adam

Aussiehash

BB02 is very good, their open source wallet works on Android and Win/Max/*Nix, supports Tor and connecting to your own full node, has a secure element, supports multisig very well. However is USB connected. Coldcard is like a cypherpunk toolkit, it has fully airgapped operation, outstanding multisig support, dice roll your own entropy, and many other crazy features like HSM mode, duress and brickme PINS, 2 secure elements, (optional) NFC, seedXOR, and many others. Would advise for advanced users not beginners. Coldcard doesn't include a wallet app, but both work well with SparrowWallet, Electrum, Specter, Nunchuk

Raphman90

There are some open source ones like https://selfcustody.github.io/krux/ and https://seedsigner.com/ https://glacierprotocol.org/ is also there if you wanna get crazy For a company sold solution I'd say https://coldcard.com/ But I really don't like the NFC stuff, and the company's recent code licensing shenanigans

Wild-Interaction-200

This is an unfair point. There can be legit discussions about whether A or B is more secure (whether QR codes are more secure than SD card or NFC or USB or whatever). The closed source debate is about something way more fundamental. With a closed source wallet you literally don't know what it is doing, so discussions about nuances are not possible because again, you have no idea what the wallet is doing. A closed source air gapped wallet might be the least secure one if it generates your seeds in a predictable manner - for example. And you don't know, because you don't know what it's doing: it's closed source. My point is: the close vs open source discussions are about something fundamental. The air gapped vs not discussions are something else.

Raphman90

seed signer uses common hardware and open source software. coldcard is made by a company coinkite which tries to do their best, but still falls in the pitfalls of being a company, like dumb features (NFC) and stuff like not being happy when people use their open source code.

Raphman90

so you have a lot of options in front of you. these are all open source solutions: [https://seedsigner.com/](https://seedsigner.com/) [https://github.com/selfcustody/krux](https://github.com/selfcustody/krux) [https://glacierprotocol.org/](https://glacierprotocol.org/) if those seem too complicated, maybe take a look at [https://coldcard.com/](https://coldcard.com/) but being a company, there's some baggage with them. namely they make dumb hardware decisions (NFC on an air gapped wallet, what?) and they're prone to bitching (complaining when another company uses their open source code). you can indeed import your words as long as both wallets support BIP39 and [derivation path](https://walletsrecovery.org/) so make sure to make note of the path, as well as your backup. ​ I don't understand your last question if I'm honest, could you elaborate?

Raphman90

[https://seedsigner.com/](https://seedsigner.com/) is an open source one you can build yourself, which is very nice. you get to verify everything [https://glacierprotocol.org/](https://glacierprotocol.org/) takes things a couple steps further and uses two laptops to make your own cold storage solution, which again is opensourced. If neither of those appeal to you then my vote would be [https://coldcard.com/](https://coldcard.com/) There are flaws (Dumb NFC things mainly) and the company does company things (flipped out when another company used their fully opensource code for another wallet lol)

Raphman90

then I'd say Coldcard would be the way to go, just make sure to never turn on/destroy that NFC

Raphman90

If I were to pick one to buy, it'd be a coldcard, but that has issues too, namely their NFC garbage (it can be disabled or destroyed, but it really shouldn't be there in the first place), and the company's code licensing fiasco. if possible look into rolling yourself an open source solution like [Seedsigner](https://seedsigner.com/) or [glacier protocol](https://glacierprotocol.org/) I understand those might be too advanced. In that case I'd go with their

longonbtc

Ledger, the hardware wallet company, has paid shills posting in this sub and other cryptocurrency related subs. Ledger is also guilty of astroturfing in this sub and other cryptocurrency related subs. The mods of this sub are fed up with this. That's why you've recently seen some of them educating users about Leger and its faults. This isn't just mods, there are also a few users from the r/Bitcoin discord that are doing the same thing. Nothing that these people have said is incorrect. They are just trying to help educate bitcoiners in this sub and teach them the safest practices for storing their private keys and signing transactions. I personally would say that Coldcard is one of the best/safest, if not the best/safest, prebuilt hardware wallet that a bitcoiner can use. A Coldcard can even be used to perform air gapped bitcoin transactions. The Coldcard Mk4 does have NFC capability but that feature is disabled by default and it can be permanently disabled by simply cutting a trace on the board. I'm not paid by Coldcard. None of the mods or the other people that have recently been educating users about hardware wallets are paid by any of these hardware wallet companies. I also recommend [SeedSigner](https://seedsigner.com) as a great hardware wallet option. A SeedSigner can be used to perform air gapped bitcoin transactions. I've seen some clueless users claim that some of the people that have recommended SeedSigner are being paid by SeedSigner or that their posts are paid advertisements for SeedSigner. Little do these clueless people know that SeedSigner is free open source software. You can download the open source SeedSigner software for free and install it on a SeedSigner hardware wallet that you've easily built yourself from cheap and readily available hardware. There is no possible financial gain for shilling SeedSigner, and none of these people are paid by SeedSigner. SeedSigner is just a very safe option for storing your private keys and signing bitcoin transactions. Now if you are an altcoiner that owns and uses a Ledger hardware wallet, then I understand why you don't like this push against Ledger and finding out that Ledger is an inferior hardware wallet. But you must understand that this advice is not for altcoiners like you. This advice is for bitcoiners. Over 99% of altcoins were created to enrich their founders, most of them are centralized, a large majority of them were premined, and they go against Bitcoin's ethos. So you altcoiners obviously wouldn't care about using a Ledger that is less secure and has privacy concerns. And this is the Bitcoin subreddit, so the advice to not use Ledger is not for you altcoiners. This advice is for bitcoiners. You altcoiners can continue using your Ledgers hardware wallets if that's what you want to do. There's no need for you altcoiners to downvote users that are simply attempting to help educate bitcoiners about the safest practices for storing their private keys and signing transactions, and there is no reason for you alctoiners to post negative replies to these users comments that are attempting to help teach bitcoiners the safest practices for storing their private keys and signing transactions. Their advice is obviously not for you altcoiners. Their advice is for bitcoiners that care about safety, security, privacy and Bitcoin's ethos. These are obviously things that altcoiners do not care about. If they did, they wouldn't have bought altcoins or be holding altcoins. Regardless of that, there are better hardware wallets for altcoiners that are actually open source and that are capable of holding a thousand+ different altcoins. The Keystone Pro is a good example of one of these hardware wallets. This is a good open source hardware wallet for altcoiners. I really hope that this comment has cleared all of this up for everyone here and that they now fully understand the situation.

Wild-Interaction-200

That’s when something like Tapsigner comes in. It doesn’t protect you against certain type of software exploits (becuse it has no screen and key input) but it stores your private keys offline and doesn the entire transaction signing on the card itself. And using it is as easy as any NFC based debit/credit cards.

Wild-Interaction-200

And I think you are overestimating the benefits of being air gapped. Having an image recognition software running on your device to scan a QR code (air gapped) is probably a much bigger attack surface than USB. SD card readers have microcontrollers with firmware on them. NFC is just another over the air protocol, etc. Ultimately your device needs to protect itself from inputs whatever the source of that input it. Air gap is highly overrated.

RUshitcoinersSERIOUS

Even Coldcard has been moving too much towards accessibility with NFC in their newest one. I agree that it’s the best out of the box solution but physically removing the NFC is a necessity.

MisterRGnome

They have a poor license not permitting commercial use which stagnates building on the work they are doing. They have a history of some **really** bad wallets before the coldcard. They also seem to be slipping up as they add NFC and other things to try to compete with ledger and trezor. There's a vulnerability floating around for ~3 year old firmeware where if you have a bunch of time money and resources a coldcard can have its secure element removed and should the attacker be lucky enough not to brick it they can get the pin. That's about the worst of coldcard.

nerd2ninja

The point of using ledger, as its marketed, is to do cold storage. I see they suggested using it for everyday purchases with their new product, but that is expensive for no freaking reason given the very good alternatives. More and more, weekly purchases are done over the internet. So costco would generate a BTC pay lightning address when your node automatically set up to buy certain things every week requests it, and then you verify what you're buying and click to approve. If you have to do the inconvenient thing of going in person, then yeah you're talking about taking your paycheck (a lightning paycheck) sending different amounts to different wallets for different spending habits based on weekly buys or free fun spending money and basically only carrying your 400 to go to the store. I do know someone that has an NFC card to multi-sig his phone though. Interesting setup, still cheaper than what ledger is trying to push on you. I

Fiach_Dubh

* Shitcoin Tier - Keeping Your Coins on an Exchange * Manure Tier - Keeping Your Coins on a closed source shitcoin hardware wallet (Ledger) that discourages you from running your own node with open source wallet software, so you are dependent upon them for transacting via ledger live/their node, while hoping they don't backdoor your coins or privacy, that utilizes bluetooth [lmao](https://www.youtube.com/watch?v=8kXbu2Htteg) * Garbage Tier - Keeping Your Coins on a open source shitcoin hardware wallet that doesn't protect you from physical attacks because it doesn't have a secure element (Trezor), and that also discourages you from running your own node with open source wallet software, so you are dependent upon them for transacting, while hoping they don't backdoor your privacy. * Acceptable Tier - Keeping Your Coins on a hardware wallet that is Bitcoin only, has 2 secure elements, but supports NFC (can be physically disabled permanently), airgapped transactions encouraged, sovereign bitcoin node use encouraged, 3rd party open source software wallet use is mandatory, firmware signature verification encouraged. Firmware is source viewable/auditable and buildable from source. (Coldcard) * Pretty Cool Tier - Stateless airgapped build your own DIY hardware wallet, fully open source software. Sovereign bitcoin node use encouraged, 3rd party open source software wallet use encouraged (Seedsigner) * Bitcoin Tier - (Glacier Protocol) - sovereign bitcoin node use encouraged, 3rd party open source software wallet use encouraged, airgap, multi-device, DIY, fully open source.

Fiach_Dubh

* Shitcoin Tier Keeping Your Coins on an Exchange * Manure Tier - Keeping Your Coins on a closed source shitcoin hardware wallet (Ledger) that discourages you from running your own node with open source wallet software, so you are dependent upon them for transacting, while hoping they don't backdoor your coins or privacy. * Garbage Tier - Keeping Your Coins on a open source shitcoin hardware wallet that doesn't protect you from physical attacks because it doesn't have a secure element (Trezor), and that also discourages you from running your own node with open source wallet software, so you are dependent upon them for transacting, while hoping they don't backdoor your privacy. * Acceptable Tier - Keeping Your Coins on a hardware wallet that is Bitcoin only, has 2 secure elements, but supports NFC (can be physically disabled permanently), airgapped transactions encouraged, sovereign bitcoin node use encouraged, 3rd party open source software wallet use encouraged, firmware signature verification encouraged. Firmware is source viewable/auditable and buildable from source. (Coldcard) * Pretty Cool Tier - Stateless airgapped build your own DIY hardware wallet, fully open source software. Sovereign bitcoin node use encouraged, 3rd party open source software wallet use encouraged (Seedsigner) * Bitcoin Tier - (Glacier Protocol) - sovereign bitcoin node use encouraged, 3rd party open source software wallet use encouraged, airgap, multi-device, DIY, fully open source.

Raphman90

tbh I agree that cold card is the easiest hardware wallet to buy and roll with. I just want to make sure to call out ALL wallet's vulnerabilities. It's about education. I wish coinkite didn't add NFC and used that R+D on something else, and I wish coinkite weren't huge babies with their code. but yeah if you're going to but a dedicated Hardware wallet it would be a coldcard.

RedditH8sThrowaways

Yes, and yes. Coldcard is the best pre-rolled hardware option, and you can at least kill the NFC. That's the only recommendation I'll make of hardware wallets I've tried (and I won't recommend one I haven't tried). Seedsigners are cool, but they *are* difficult to recommend to the average person. Airgapped software wallets, IMO, are the best option. They are the most verifiable, least trust-requiring, can be the most secure, and there are options which are legitimately easy to set up.

Raphman90

so then ledger's bluetooth stuff you shouldn't like, right? or coldcard's NFC crap

Raphman90

Decent, but has its own issues, the mk4 has NFC on it for some stupid reason (it is off by default, and you can destroy it physically, but why is it there to begin with?) Also the company threw a hissy fit when another company used their opensource MIT licensed code (lol) and changed the license

VeganDemBitcoiner

BlueWallet for the interface and notifications and Nunchuck for the NFC

CallingVoid

Ledger and Trezor are not good solutions and we need to stop recommending them. Best option is a DIY signer with an old bit of equipment using an airgap, best commercial option is currently coldcard (but make sure to destroy the absolutely pointless and potentially dangerous NFC functionality after you buy, thankfully they made it easy)

rwdrift

I've never used a ledger but you just need a HW wallet (or repurposed mobile running say, Bluewallet) that can accept transactions for signing and then transmit it back to the hot device for sending. Normally it's done by QR code, SD card, USB or NFC. The simplest way is a hot mobile that has one key and a cold mobile/HW wallet that has another. You create the partially signed transaction on the hot mobile, pass it to the other device for the second signature, then pass it back for transmitting to the Bitcoin mempool. The cold device can also check that the "change" address of the transaction is legitimate in case the hot device has been compromised. Several HW wallets do this.

slutfarming

The NFC feature of the Mk4 is disabled by default and it can be permanently rendered unusable by just cutting a trace on the board.

Raphman90

It might have been me to say NFC is bad lol. Fwiw you can permanently destroy the NFC, not that it makes it much better.

couchguitar

Ive researched ColdCard and like someone else said NFC does not sound like a good idea. But if I can find an MK3 that might be better

CallingVoid

Trezor and ledger are not as good as their marketing would suggest. These days i'd recommend a coldcard (make sure to kill the stupid NFC chip before using) or a DIY setup like an old laptop with WiFi removed, for example. Also users should use a foss software wallet to interface with their hardware and a pruned/full node.

Maxx3141

What speaks against carrying it in your pocket / on your keychain? It will look like some NFC device or USB stick for almost all people. If you have a good hw wallet (like a Trezor or Ledger) you should know that it will wipe itself after a few attempts to enter the pin. Hardware-hacks to extract the seed are possible in theory, but almost non-existent in reality. For an extra layout of security you should setup wallets with a passphrase to get an additional layer of security. The passphrase will be like a "25th word" for your seed, so it generates a new wallet, while not saved at the device. This also means you can't enable it in retrospect though.

Er1Ck010

Its a NFC chip with a LnURL connected with a Lightning wallet. Everyone used it at BTC Amsterdam this year. The Wallet can be custodial or non-custodial. Please dont make any assumptions if you dont know what your talking about.

Simple-Afternoon4173

I think there are lots of misconception around NFC, nevertheless, i think nfc has its place in multisig setups, where the mk4 only provides one of the signatures, but on its own it remains basically useless.

Raphman90

I don't disagree, but people need to just realize the dangers that come with something like NFC. I personally think it's a terrible inclusion

Secret_Two_576

The NFC functionality is fully optional on a cold card. This is verging on paranoia + FUD that leads people to never buy bitcoin.

senfmeister

>Their recent mk4 comes with NFC support that flies in the face of what their philosophy was. They're appealing to the masses and trying to get your money, making their device less secure in the process. It's off by default and you can physically disable it forever.

coincorner-support

Not sure where you're based but our contactless [bitcoin lightning card](https://www.coincorner.com/TheBoltCard) is also a good way to show people how easy using the Lightning Network is. If you're able to have a CoinCorner account you can add sats onto the card that can then be swept directly to their wallet using NFC on their phone. If you're not able, or don't want to, have a CoinCorner account you can still do this non-custodially using LNbits. [BTCmap.org](https://BTCmap.org) is also a great resource for finding local or online merchants. Adam

VeganDemBitcoiner

I’m using it since it’s the only one with NFC but there is no coin control (and labeling), no coin join integrated and the UX is pretty rough. Would love if those issues where fixed !

Socialists-Suck

Since you're more technical user I'd suggest Nunchuk. [https://nunchuk.io/](https://nunchuk.io/) It has the best multi signature support that I've seen. Works with various NFC enabled devices. Allows setting of fees by transaction. easy to see all the wallets you've created. Open source on github: [https://github.com/nunchuk-io/resources](https://github.com/nunchuk-io/resources)

mosslyharmless

It depends on the hardware wallets because there are several different designs. But yes you can be air-gapped at all times. Options are: 1) Plug in to USB (trezor, ledger). Not technically air-gapped, but the seed never leaves the device and the cryptography is done on the device. 2) Using microSD cards to transfer data between host and signing device (COLDCARD). 3) Using QR codes the transfer data between host and signing device (SeedSigner, Passport, Jade) 4) NFC. I think Jack Dorsey's company is working on this

DoolyDinosaur

I think the NFC signing is convenient. But not sure of the value of multi sig (w/Tapsigner) if you’re not collaborating.

shadyghxst

You can airgap your mobile device and generate the seed . There are even mobile wallets that allow you to use an old phone offline to generate your seed , sign Txs before you broadcast via BT or NFC to your regular everyday use online mobile device.

repomies69

Any idea if these places accept payments via the boltcard/NFC? Makes it very easy

random668655578

Pretty sure the coldcard Mk4 can sign transactions from your phone wallet with an NFC tap.

123skid

🤣🤣 Thanks, I needed that. NFC

CoinCornerMolly

It’s sending to a Lightning Address. We wanted to show off all the different ways to send via Lightning - NFC/QR/Lightning Address

coincorner

The Bolt Card > CoinCorner (via NFC) CoinCorner > Muun (via QR) Munn > Phoenix (via QR) Phoenix > CoinCorner/The Bolt Card (via Lightning Address) The Bolt Card > Wallet of Satoshi (via NFC)

-SPRENGMEISTER-

I just remembered that the new mk4 coldcard has NFC, so you can use it with a smartphone. Here's a tutorial: https://youtu.be/eLG8Atcd-l4

grndslm

Ethereum makes for poor money and less decentralization by throwing more info in the first layer than just the "money" portion. Ethereum wasa security due to premined tokens, and it's 200% a security now that it's moved to PoS. It's not money. And yes, there are several cold wallets being built for ease of use... NFC, fingerprint scanners, etc.