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Reddit Posts

r/BitcoinSee Post

Blockchain shows individual address amounts or cumulitive wallet amounts?

r/BitcoinSee Post

Hardware + Electrum + Lightning = Cold signing wallet on PC + Hot LN wallet on Android

r/BitcoinSee Post

2024 most recommended HW for BTC only

r/BitcoinSee Post

please verify my process for moving paper wallet to electrum offline wallet

r/BitcoinSee Post

CASH APP can't send to LNurl / lightning address?

r/BitcoinSee Post

Did I get scammed?

r/SatoshiStreetBetsSee Post

COLANA token is the first Solana crypto drink Meme project. The only Meme you can Taste

r/CryptoMarketsSee Post

COLANA token is the first Solana crypto drink Meme project. The only Meme you can Taste.

r/CryptoMarketsSee Post

COLANA token is the first Solana crypto drink Meme project. The only Meme you can Taste.

r/CryptoMarketsSee Post

COLANA token is the first Solana crypto drink Meme project. The only Meme you can Taste.

r/CryptoMoonShotsSee Post

Introducing Land Dropped

r/CryptoCurrencySee Post

Unraveling a 40M+ Investment Scam

r/BitcoinSee Post

Help/Advice Needed - Recovering a damaged paper wallet private key QR code

r/CryptoCurrencySee Post

Brand new phone as a hardware wallet

r/BitcoinSee Post

Brand new phone as a Hardware wallet

r/BitcoinSee Post

Payment hasn’t gone through

r/BitcoinSee Post

Saylor Deep Fake Video

r/BitcoinSee Post

My brother passed away and I think he had bitcoin, how do I retrieve it?

r/BitcoinSee Post

How I store my keys

r/BitcoinSee Post

Will Throw My Blockstream Jade Out Of The Window

r/BitcoinSee Post

What do i do with this

r/BitcoinSee Post

Question for those using SeedQR.

r/CryptoCurrencySee Post

Help with Binance Payment (BTC)

r/CryptoCurrencySee Post

Can you believe Michael Saylor's deep fake is live on YouTube?

r/BitcoinSee Post

Any hot wallets that allow entropy?

r/CryptoCurrencySee Post

Is anybody else seeing these Deep Fake sponsored ads on YouTube?

r/BitcoinSee Post

Android Ledger QR code glitch

r/CryptoCurrencySee Post

Why is a blatant scam depicting Michael Saylor allowed to be shown as an advertisement on Youtube?

r/CryptoCurrencySee Post

Cake Wallet displaying the correct address for a transfer, but the block explorer displaying a different unknown address

r/CryptoCurrencySee Post

Call me absolutely crazy, but isn't the 5th gen ipod nano from 2009 the best form factor for a hardware wallet

r/CryptoCurrencySee Post

Youtube is pushing a "Doubling Money Scam" for over a month. When reported they responded "it does not Violate Google's policies" and they weren't going to remove it.

r/BitcoinSee Post

Why does no one talk about airgap.it? Free open source airgapped wallet, uses an old phone

r/BitcoinSee Post

What is considered the best bitcoin-only airgapped hardware wallet that uses QR codes to sign txns instead of a SD card like coldcard?

r/CryptoCurrencySee Post

Looking for wallet software

r/BitcoinSee Post

Blockstream jade - what happens if you lose your SeedQR?

r/BitcoinSee Post

Jade Wallet - why do you need to connect to blkstr server to verify pin?

r/BitcoinSee Post

BTC ATM

r/BitcoinSee Post

On this day, 10 years ago, a college student held up a QR code live on ESPN during a college football game

r/CryptoCurrencySee Post

Crypto Swap Gone Bad! - a cautionary tale.

r/CryptoMoonShotsSee Post

Introducing SOLAV

r/BitcoinSee Post

SeedSigner

r/BitcoinSee Post

Airgap Interfaces

r/BitcoinSee Post

Why are QR codes of the same address not identical?

r/BitcoinSee Post

Question about Seedsigner

r/CryptoCurrencySee Post

Moonrise

r/CryptoCurrencySee Post

[REQUEST] Feedback from owners of various hardware wallets, especially NGRAVE ZERO or BITBOX02 (or any other recommendations?)

r/BitcoinSee Post

Hi,guys I need someone to please help scan my wechat QR code for Verification.

r/BitcoinSee Post

Hi,guys I need someone to please help scan my wechat QR code for Verification.

r/BitcoinSee Post

Would you use this no-KYC service?

r/CryptoCurrencySee Post

On Kraken. Do I need to provide ID in order to send BTC, trade to XMR and withdraw?

r/CryptoCurrencySee Post

Cambodian digital currency bakong amps up use case with Alipay agreement

r/BitcoinSee Post

Converting regular coins into Casascius like coins, is there a way?

r/BitcoinSee Post

Bitcoin Purchases on Top of Fiat QR Code Payments

r/CryptoCurrencySee Post

Just a dock for my Trezor Model T

r/BitcoinSee Post

I have become homeless and due to beta lactum infection I have lost my legs and I m not able to afford any food . If anyone can help me I would appreciate it

r/BitcoinSee Post

99% of businesses will never accept bitcoin. Lightning will be the payments technology that leads to the entire financial world running on bitcoin.

r/BitcoinSee Post

Blockchain.com Invalid QR

r/CryptoCurrencySee Post

Familiar Web2 signup & login on Portkey

r/BitcoinSee Post

A Comprehensive Guide to Ledger Live: Securely Managing Your Crypto Assets

r/BitcoinSee Post

Blue wallet VS Sparrow wallet

r/CryptoCurrencySee Post

Help me remember the title to an old bitcoin documentary

r/CryptoCurrencySee Post

Help me remember the title of an old Bitcoin documentary

r/BitcoinSee Post

Bitcoin Energy Drink?!

r/BitcoinSee Post

How to send my bought BTC I have received from an ATM ?

r/CryptoCurrencySee Post

Give a warm welcome to eXch Exhange Banner! Thank You Very Much For Becoming The New Owner Of Our Community Banner For The Next 5 Days. Welcome!

r/BitcoinSee Post

Blockstream Jade can't scan QR codes

r/BitcoinSee Post

Satscard to store btc

r/BitcoinSee Post

Bitcoin as a present

r/CryptoCurrencySee Post

Welcome AgoraDesk for renting the banner! Thank you very much for becoming the new renter of the banner of our amazing community for the upcoming 24 days!

r/BitcoinSee Post

Does changing the "label" on bitcoin core receiving address update labels for others?

r/CryptoCurrencySee Post

Medal of Rekt R/CC edition

r/CryptoCurrencySee Post

Does sending crypto via QR CODE work with an older webcam?

r/BitcoinSee Post

Weird idea.... need help with website

r/BitcoinSee Post

Trezor, Amnesia Style?

r/CryptoCurrencySee Post

Hardware wallets revisited

r/BitcoinSee Post

Bitcoin ETF hype

r/CryptoCurrencySee Post

What is OPOS (not the token)

r/CryptoCurrencySee Post

ENS (Ethereum Name Service) a simple explanation

r/CryptoCurrencySee Post

Hello, i just got this binance crypto red pocket, please scan this QR code so you can win 0.02 usdt and i'll win with you of course, and thanks for your time.

r/CryptoCurrencySee Post

Hello, i just got this binance crypto red pocket, please scan this QR code so you can win 0.02 usdt and i'll win with you of course, and thanks for your time.

r/CryptoCurrencySee Post

Choose & Buy Cryptocurrency Wallet Solutions Viable as Per Your Business

r/CryptoCurrencySee Post

Best Cold Wallet

r/BitcoinSee Post

Scammed by Bitpay for over $320

r/CryptoCurrenciesSee Post

Bank of China: Mandating Digital Yuan Retail Payment Option (Crypto)

r/BitcoinSee Post

It does exist a cold wallet with a QR scanner for the payments? If it doesn't, would be a good idea?

r/BitcoinSee Post

We're Closer Than You Think

r/BitcoinSee Post

Lightning is the only viable payments infrastructure for a global world.

r/BitcoinSee Post

Adding watch only to nunchuk

r/CryptoCurrencySee Post

Host your own Payment System with your own Bitcoin & Lightning Node, you can even add your own Nostr Relay in PC or Mac for Free, see video.

r/CryptoCurrencySee Post

Do you know that you don't need hardware wallets for cold storage?

r/BitcoinSee Post

Restoring old paper wallets

r/BitcoinSee Post

Can you receive Coinbase currency via a QR code?

r/CryptoCurrencySee Post

Yesterday, the average John guy learnt about gas and smart contracts. Now he needs our help to understand the Defi wallets

r/BitcoinSee Post

Blockstream Jade QR Pin unlock

r/CryptoCurrencySee Post

I made a descriptive post of every item that you can purchase using candies from Coingecko so you do not have to look

r/BitcoinSee Post

A sight reading video and an example on how Bitcoin use in the real world. Sending tips is like sending a text messages. Use Bitcoin Lightning Wallet and scan this QR code to tip me a satoshi.

r/BitcoinSee Post

A sight reading video and an example on how Cryptocurrency use in the real world. Sending tips is like sending a text messages. Use Bitcoin Lightning Wallet and scan this QR code to tip me a satoshi. "Time you enjoy wasting, was not wasted." - Beethoven

r/CryptoCurrencySee Post

How do I know if this crypto transaction is a scam?

r/BitcoinSee Post

Coldcard Q1 — any update on when this thing releases?

r/CryptoCurrencySee Post

Is QANX a scam?

Mentions

Things have almost reached a level where Multisig is beginner friendly. It goes all the way back to Bitcoin Armory Lockboxes in approx 2012. https://bitcoiner.guide/multisig/ There are paid services like Casa, Unchained and Nunchuk that can hold your hand and take you through it, for a fee. The nuisance at the moment is the evolution of standards, and subsequent desktop wallet and hardware wallet updates. Hardware wallets use PSBT, BIP48, Animated QR codes, and Blockchain Commons UR/Envelope formats for the multisig wallet descriptor. Then there will be PSBT2, MuSig, Taproot, BBQr. Every time there is a major software update, you need to download a new desktop wallet version, a new hardware wallet firmware, update PGP keys, check the PGP and SHA256 signatures match, flash the new firmware via MicroSD card. Far too complex and tedious for a beginner, let alone the actual steps of backing up 3 - 5 mnemonic seeds and storing a full copy of **all cosigners' XPUBs** and wallet descriptor, with each geographically separated mnemonic seed, plus then remember the hardware wallet PIN for 3 - 5 different hardware wallets.

At the start I was like, ok I'll have it uninitialised every time and scan the QR Then I was like... Wait that means getting my seed QR out every time, and we're meant to keep this protected. So I thought, ok, I'll just keep it initialised and put a pin on it. Enters pin, now you gotta scan the QR code on the blockstream website, Christ. It was quicker to just scan the seed QR! What I don't get about it, is I don't find how scanning the qr on blockstream is any more secure, because anyone with your device and pin can do it, you can open the scan bit on any web browser or phone, there is no additional pin or anything to bring up the option to communicate with the blind oracle. Also I've barely used my jade but when I move the scroll thing to the left, it always skips 2 characters, whilst moving it to the right is fine

Mentions:#QR

A lot of misinformation here. Your CB wallet is a custodial wallet. That means CB has control over it and they hold the seed phrase. You want a non-custodial wallet which will give you full control over your assets. Non-custodial wallets can be hot or cold. A hot wallet is one in which the seed is stored on your device in a wallet app such as MetaMask. A cold wallet stores your seed offline. It could be a piece of paper with your seed written on it in a lock box in your home. Or it could be a device that stores your seed and doesn’t connect to your computer. Some devices, such as Ledger, I call a warm wallet, because you have to connect your wallet to a computer to use and Ledger may have the ability to capture that seed. If you do a lot of trading, a cold wallet can slow down transactions a bit. It takes me about an extra 15 seconds to execute a transaction with my AirGap wallet. However, that is because I use a passphrase and I have to enter with each transaction. If I didn’t have that passphrase, it would only take 5 seconds more. The AirGap uses an old iPhone that I have the cellular and Bluetooth disabled on. I use MetaMask to start a transaction on my regular phone then it shows me a QR code. I scan the QR code with the AirGap phone, then it asks for my fingerprint and passphrase, and then provides a signature in the form of a QR code. I scan that with my regular phone in MetaMask and that completes the transaction. Now, I also have a hot wallet address on MetaMask that I keep a small portion of my assets for trading so I don’t need to carry two phones all the time. I move assets to and from the cold wallet address to keep the cold wallet secure. I never connect the cold wallet to any dapps. I highly recommend AirGap.it and use it with MetaMask. I also recommend you look into 13 or 25 word seed phrases. Those are normal 12 or 24 word seed phrases, but then you select a 13th or 25th word or phrase that creates different wallet addresses from the original passphrase. That means someone could get my passphrase and they still wouldn’t be able to access my wallet without that passphrase. They could brute force it, but it would take a long time and give me time to move my assets. I keep my passphrase on a metal wallet as well in case my device is lost or stolen. I have a cypher that it needs to be entered into so that the real seed is known, which means even if that gets lost or stolen, my seed is still secure. The cypher is a script on my computer that turns the stored numbers into a seed phrase. Take your security as serious as a bank, because there is zero recourse if you lose your funds in defi.

Mentions:#QR

> Thanks for the information! I don't quite follow on the quote above. Do you generate QR codes of your seed phrases? How do generate them and encrypt them? As I said above, I'm using Krux as my hardware wallet. I already had a seed phrase (though I could have used Krux to generate one). I loaded my seed phrase into Krux and made an encrypted SeedQR. I also used the feature in Krux tools to make a QR for my decryption key. So... to use Krux, I scan my encrypted SeedQR and then scan the decryption key to decrypt it. I'm shocked that more hardware wallets aren't offering encrypted SeedQRs yet. That feature is a real game changer. I can load my seed and decrypt it faster than people can enter a PIN to unlock a traditional hardware wallet. Since Krux is stateless (meaning, the seed & passphrase are wiped out when the device is turned off) there's no need for a PIN, since there's nothing on the device to lock. And since encrypted SeedQRs are encrypted, they can be stored anywhere. Obviously, it still makes sense to keep them locked somewhere safe, but they don't really need to be hidden since they're encrypted. Since I'm using a 24 word BIP85 child seed as the seed phrase for my wallet and a 12 word BIP85 child seed as the passphrase for my wallet, I don't need to save those QR codes. I only need the parent seed QR code. Parent Seed --> Generate 24 word child seed. There's my seed phrase! Parent Seed --> Generate 12 word child seed. There's my passphrase! BIP85 is amazing. It's like a master key for millions of wallets, all of them yours, and all of them backed up by a single parent seed phrase. Obviously, I back up the child seeds I use... but I keep my parent seed backed up on metal in 2 locations (a safe and a safe deposit box), plus I have my encrypted parent SeedQR.

Mentions:#QR#PIN#BIP

>I use a 24 word seed *as my seed,* and a 12 word seed *as a passphrase.* Both are encrypted [like this](https://imgur.com/a/mfO8c4c) Thanks for the information! I don't quite follow on the quote above. Do you generate QR codes of your seed phrases? How do generate them and encrypt them?

Mentions:#QR

Naturally the greatest FOMO points are adjacent to new all time highs (ATH points). I recommend 25% sell orders at ATH, with additional 25% for each +20% above that ATH point — but less than 25% of total holdings in the active trading tranche (>75% in "cold" storage — offline in hardware wallets as secured by metal seed recovery mnemonic or manually scribed QR plates). For cold storage, consider learning about multi-signature self custody and paper (volvelle) secret sharing schemes (https://secretcodex32.com/faq/index.html). But beware that these are nascent efforts requiring considerable commitment to learn, utilize, and routinely drill on. I wouldn't commit more than 25% of your savings to any of these yet. Adopt in slow stages; commit only nominal funds for at least a year of usage and recovery drills. In any event, commit to annual key/seed recovery drills — with any life partner or heirs involved!

Mentions:#ATH#QR

Good questions! One overall note is that we have built Casa's security system specifically to secure hundreds of millions in BTC by one person/entity, and we secure much more than that across all of our members. One resource that might be helpful is our Wealth Security Protocol, which has more details about all the different security decisions we've made. Here is a link to the [Inheritance page](https://docs.casa.io/wealth-security-protocol/chosen-features/inheritance), but you can also check out the rest of it to learn about Casa's overall security model. [Our blog](http://blog.casa.io) also has technical posts. The WSP inheritance page doesn't go into full technical details like what you're asking about, so here are some answers. >all I know is typically Casa sets up a 2-of-3 multisig wallet where the 3 keys are: >H: hardware wallet key >M: mobile key >C: a key held by Casa on their server-side infrastructure This is correct for our 3 Key Vaults. We also offer 5 Key Vaults and would recommend that for your level of holdings. This is a 3-of-5 multisig where 1 key is on the phone, 3 keys are on hardware wallets (different hardware to protect against single manufacturer problems), and 1 is held by Casa. >Is my understanding correct? Your run through of how the inheritance process works for the 3 Key Vault is all correct. In a 5 Key Vault, you would also need to provide for access to at least one hardware wallet. The nice thing is that this is all managed within the app, so it makes it easy for family members to use. >And Casa's Android app does not appear to be open source, but has it been audited by a third-party? Yes, we do yearly external security audits and frequent internal audits + have many security checks in place around code that is deployed to customers. You can also verify everything we do using open source software like Sparrow in a watch-only wallet, and the hardware wallets act as checks on our software since we don't control them. >What is the source of entropy used to generate M\_k? We generate the entropy on the user's device using the standard iOS/Android entropy functions. >What if the recipient's phone is destroyed: can they recover M\_e? Yes, this key is encrypted and backed up to the cloud (iCloud/Google) in a quasi 2of2. If your/the recipient's phone is destroyed, you would get a new phone, log in to your cloud provider, log into Casa, and it restores the key. You can also back up this key on paper using an encrypted QR code if you don't trust the cloud providers. The mobile key is meant to be highly resilient, which means we add in some trust with cloud providers, but that is balanced by the other keys in the multisig being held offline. LMK if that doesn't fully answer your questions, or if you have others. ------ A final big reason people use Casa, which you didn't ask about but which I think is important, is that our advisors are highly knowledgable and work directly with our members *and their families/attorneys/etc* every day on this stuff. They get very hands on, over video, and ensure everything is set up properly & help think through security, opsec, estate planning, etc. Some of our members are technical enough to do this themselves, but really like that our team can help their family or designated executors in the scenario where they've passed away.

Mentions:#BTC#QR

You engraved QR into steel? 😃

Mentions:#QR

That’s exactly my setup. Using a seedsigner so I have the words in metal and also the QR in a metal seed QR

Mentions:#QR

Yeah, I was so paranoid about how to manage the seed phrase, but since I discovered the passphrase thing, I don't even mind keeping a seed phrase QR code around\*, and using the Jade more as a signer. I'd still keep it in steel, just in case of disaster, but it doesn't have to be kept as hidden or secured. (\* I mean, I'm not going to try and expose it, but it doesn't have to be quite so secret.)

Mentions:#QR

I think there may be some confusion of issues going on here... not sure. When you mention BIP39... you're already backing up a seed phrase, correct? You're just asking about having a hardware wallet generate it? (vs what? software wallet on a computer? generating it by throwing dice?) Also, when you say password... do you mean passphrase? (ie. 13th or 25th 'word') If you mean passphrase, I think combining the seed phrase and passphrase is an excellent idea, so long as you really understand the concept (ie. a new wallet is being created), and come up with a proper method for keeping track of both the seed phrase and passphrase. It adds a lot of security (if done correctly), w/o upping the complexity a whole lot. I'm not sure I see the point in storing anything on an offline USB. You'd have to explain that more... but it would be hard to put anything on a USB w/o being completely certain you weren't somehow compromised in the process. I'd just stick to physical backup methods... get the seed phrase down on paper, then make a more durable backup (like metal plates, washers, etc.). The nice thing about adding a passphrase, is you could keep it in a cloud-backed password wallet, so one is physical in your home, while the other is digital. Neither work on their own, so the seed phrase is useless if compromised by the bugler or house-guest, while the passphrase is useless if a hacker cracks the password wallet, or your computer had a key-logger when you entered it in or created it. As for generating your own seed phrase vs a hardware wallet generating it... that is a pretty big debate within the community. It depends on how random you think you'd be possible of generating, vs how much you trust the mechanisms of the hardware wallet. I'm just using my HW wallet, as I've read up on their process, and feel pretty confident in it. It might be harder than one thinks to do it themselves, but certainly not impossible, and then you're not trusting anyone. (There was a pretty good method using a deck of playing cards I looked at, that might be a good alternative to buying casino grade dice. It's just that the HW wallet's generator seems even better to me.... trust issue, aside.) I'd honestly avoid Ledger. I hate to say that, but they've been careless and some of their options seem reckless (even if there is zero bad intent). I'm a fan of the Blockstream Jade for it's simplicity/flexibility/price, but have heard great things about ColdCard and Passport, too. They are more expensive, and have additional features... though the camera on the Jade for air-gapped QR codes is a huge feature for me!

Mentions:#BIP#QR

Using a Bitcoin wallet might be especially unfamiliar to a non-tech native person, but it was even a learning experience for me as a 30+ year tech professional. Since it isn't something you've done before, you'll have a bit to learn. That said, they aren't especially hard to use. There are only a few concepts involved, combined with a few user-interface choices utilized by most wallets. Once you make your choice of a wallet(s), you should be able to learn the basics about it in just an hour or two. The basic stuff is really not difficult... just a bit first-time intimidating, especially since money is involved. (ie. wouldn't you be a bit nervous too, the first time setting up a bank money transfer?) Pick a wallet. I'd suggest a hardware wallet if you're going to be dealing with anything over like $1000 worth of Bitcoin, maybe even $500. In other words, unless you're just experimenting with small amounts, you'll need to make this jump anyway... so just plan on getting one right from the start. I like the Blockstream Jade, as it is inexpensive, flexible, open-source tech, and fairly easy to use. You'll also want a software wallet to interface with the hardware wallet. I'd recommend BlueWallet, or maybe Blockstream's own Green Wallet (but I prefer splitting vendors, here). Start by doing small test transactions between the exchange and BlueWallet (the software wallet you picked). There are a few concepts to learn here, like generating/recording the seed phrase, generating receive addresses, calculating fees, and awaiting/watching the transaction. You'll be able to find videos walking through these things on YouTube using these pieces of hardware & software, so you aren't going in blind. For extra credit (and a good learning experience), you can even delete the app/wallet and start over by restoring your seed phrase. (This is good to know, but will also teach you that the Bitcoin is 'out there' on the blockchain, not 'in' your wallet. The wallet is like a viewport and control-key.) Once you're comfortable with that, go on to watching some videos about the Jade (hardware wallet) and a few of the extra concepts there (including deciding which way you're comfortable interfacing the Jade with your phone/computer... ie. Bluetooth, USB, QR-code). There are ease of use/security tradeoffs to each, but none are bad or especially unsafe. BUT.... that's mostly the technical stuff. The biggest things you will need to learn is how Bitcoin works (concepts, not necessarily on the technical level), and how to responsibly protect it (many of the things banks and credit card companies do for you in the fiat world). That's where most of the learning curve comes in, and we're all a bit in the same boat there. Time spent here will be well worth it... and there is a LOT of information out there, and the experience of the community to learn from (including people who've lost it all). If you're unwilling to put some time in... just invest in Bitcoin ETFs.

Mentions:#QR

Air-gap limits the surface of attack. Really bloody hard to squeeze a virus into a QR code.

Mentions:#QR

I have some very specific technical questions about Casa, which I actually asked Pete Rizzo just yesterday: I had started my research and encountered your product. However I don't trust it enough yet to hold hundreds of millions of dollars' worth of bitcoins. Do you have a truly detailed whitepaper explaining all technical aspects? My cursory research led me to [https://cointelegraph.com/news/casa-multi-key-solution-bitcoin-inheritance](https://cointelegraph.com/news/casa-multi-key-solution-bitcoin-inheritance) And after reading this article, all I know is typically Casa sets up a 2-of-3 multisig wallet where the 3 keys are: - H: hardware wallet key - M: mobile key - C: a key held by Casa on their server-side infrastructure Then the bitcoin owner (who wants, upon his death, his bitcoins to be transferred to a recipient) generates a random cryptographic key (M\_k) and encrypts M with it (M\_e). If someone possesses both M\_k and M\_e, they could decrypt it and obtain M. From what I understand, the owner shares M\_e via a QR code with a recipient. So I presume M\_e is never sent to Casa's server-side infrastructure as it is read directly from the QR code. And M\_k is sent to Casa, I think. Later, if the owner dies and the recipient requests access to the wallet, Casa tries to ping the owner for 6 months, and after this period they send M\_k to the recipient, who can then decrypt M\_e and obtain M. Now the recipient can use M and C and thus has 2 of the 3 keys to access the wallet. That's how I think Casa implements things, according to my understanding of the vague [cointelegraph.com](http://cointelegraph.com) article linked above. Is my understanding correct? And Casa's Android app does not appear to be open source, but has it been audited by a third-party? What is the source of entropy used to generate M\_k? What if the recipient's phone is destroyed: can they recover M\_e? All these unanswered questions are the reason I don't yet fully trust Casa. Perhaps you could shed some light. I would prefer if you posted your response as a reply to this comment. But you can also email me at [halfbillion2@gmail.com](mailto:halfbillion2@gmail.com) Thanks.

Mentions:#QR

Electrum works really well for this. Try to use a old camera that isnt connected to the internet for copying your QR pub keys Look into Down Loading Tails OS to a thumb drive. It has Electrum preloaded and will be beneficial.

Mentions:#QR#OS

Can someone explain how a QR code controls the wallet into looping infinitely?

Mentions:#QR

You can brighten the little screen on your jade and slow down how fast it transitions the QR code. I believe you can also turn up the resolution of the camera. I agree that this aspect has some room for improvement. Also, one of mine had a faulty USB-C cable. Otherwise great product at a great price.

Mentions:#QR

You had me at QR code. Soon as I see those things I think scam

Mentions:#QR

If you have Blue Wallet connected to Umbrel, you can import the xpub from Green Wallet as a watch only wallet in Blue Wallet and will see your balance. I know that it works with Umbrel and BW because I have the same setup. But I'm not sure where you can see the xpub in Green wallet. Shouldn't be hard to find though. Probably even as a QR that you can scan with Blue wallet. Be aware that afaik Blue Wallet doesn't work with TOR anymore, so you need to connect it using your Umbrel's local IP, which of course means that the watch only wallet only works while you are in your local network, not on the go. For me that's good enough.

Mentions:#QR#TOR

I was about to be really scared that they could build the transaction approval into the QR. The wallet &others need to figure out how to stop that spam attack or whatever. Did you try unplugging it?

Mentions:#QR

Hi, I'm trying to do this but I don't know where to make the deposit. It gave me a QR code, what's the next step?

Mentions:#QR

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Mentions:#QR

Why "pen style"? This implies that you want it to be connected over USB but using QR Codes or other airgapped methods are more desirable. They are just a lot more future proof because USB connections give malware a super speed and super wide highway to your hardware device. Air gapped solutions are less convenient, but this is a feature, not a bug. They also have much less room to fuck about in. For example, QR Codes can't send a lot of data without becoming too small and detailed to scan, and files on an sd card are READ, but they don't get to send randomised spam to a multi-pin connection that could cause the device to malfunction or misbehave. This is typically how vulnerabilities are found and exploited remotely. USB, radio features like bluetooth, they are convenient and secure for now, but not very future proof.

Mentions:#QR

Some old glory hole are turned into annon crypto exchanges . Show your QR code through the hole... Done.

Mentions:#QR

Buy a Walmart gift card add it to your Walmart app. Scan any Walmart gas pump QR code. Go inside and buy anything Walmart sells and pay with Walmart app.

Mentions:#QR

Keep in mind that you can adjust the screen brightness and slow down the QR code that Jade generates in the case that your webcam is slow or low fidelity. It’s not what you were mentioning about its camera, but is tangential and perhaps useful to others who are using it air gapped.

Mentions:#QR

Hmm interesting, I did use a QR code. I did not see a warning tho. I will try testing again

Mentions:#QR

It's on r/TheLightningNetwork. Scan the till QR code and pay directly from your LN wallet. https://youtu.be/5SiYFilO0Jw

Mentions:#QR

do you sign via QR code ? my version of electrum cannot include the whole transaction in QR code so i need to use an USB stick to transfer the TX. there is a a warning under the QR code about this

Mentions:#QR

Hmmmm this is very secure with a giant QR code on screen lol

Mentions:#QR

Couldn't someone with a good camera just sit back and steal the QR codes? Is this very secure?

Mentions:#QR

Near isn't the issue... I literally have a 100x zoom on my phone and I can scan a small QR code from pretty far, especially a large one like this. This desperately needs at least a privacy screen like normal ATMs.

Mentions:#QR

So someone puts up a camera near that and scans my QR code faster than I do?

Mentions:#QR

With Bitcoin, and particularly lightning network as this store advertises, you don't need a card. Assuming you have a wallet on your phone it is as simple as scanning a QR code at the register in the app and clicking "send". Not entirely different than using tap and pay on your phone with a credit card.

Mentions:#QR

It's just the address and private key printed on paper, sometimes with QR codes that represent them. To spend them, import the key by typing/scanning the private key into a software wallet.

Mentions:#QR

With lightning basically have a separate wallet with some bitcoin stored off chain and new transact directly through invoices. The store creates an invoice you scan the QR code and a payment is set up directly between you and the vendor later you can close the channel and settle on chain.

Mentions:#QR

You generated a random seed, and the application would generate a private key-public key pair, and a Bitcoin address. The public, Bitcoin address would be visible on the front of the paper wallet as a QR code and the string of the address, and you would hide the QR code and string of private keys by folding the paper over a couple times. If you wanted to send to the paper wallet you scan the QR address and send to it. If you wanted to spend from it you would scan the private key and sweep it into a software wallet. Importantly (and this was written in the paper wallets), you’d spend ALL of the bitcoin from that address when using it, as there was no change address, and fuck knows where the change might go. As you can see there are a few security issues, such as “is the paper wallet generator *really* generating me my own, unique, random private key?”, that the private key is easy to see if anyone finds the paper wallet, and newbies not understanding how to fully sweep a wallet. (Even I got that slightly wrong but can’t be added retrying it)

Mentions:#QR

I keep an Electrum watch only wallet on a TAILS usb that is cloned and keep them in two safe corners of the world. I a picture of the QR code and deposit Bitcoin and don't ever touch the USB's. I just peek at the numbers from a device when I remember to.

Mentions:#QR

My explanation is not perfect. I left out the difference between hot and cold wallets, how bitcoin can be used outside of lightning and the fact you can transact bitcoin ten different ways besides just QR codes...but yeah, I'm glad you like the post!! If you do get into Bitcoin, please DYOR!! Without research, you won't understand what you are doing and why it is important to be careful. There are countless scammers out there and if you don't know what you're doing, you could lose a lot or everything. Good luck! Welcome to Bitcoin!! Its truly for everyone.

Mentions:#QR#DYOR

You don't need to turn the bitcoins back into some other thing and put that into the cash register. They have bitcoin lightning. They just create an invoice QR, you can it, then send it and publish it to the network, then the network routs it from your wallet to their wallet and then they have it.

Mentions:#QR

Bitcoin is held in 3 possible forms. First, it can be sitting on an exchange. Second, you could be holding it in a hardware wallet (offline only). The third is called lightning, it's a second layer for the bitcoin network that allows instant, low-fee settlements of bitcoin, usually referred to as Sats or Satoshis, which are each 1/100,000,000th of a bitcoin. So if you wanted to pay for something small and cheap, you would ideally use the lightning network. It's not the same as using a debit card, but it's easy as that; all you need to do is have the merchant scan a QR code (or vice versa) to send or receive the Sats you want to transact. Voila. Fast, easy, reliable and irreversible transaction. If the other party wanted to refund you for any reason, they'd simply press a few buttons to send it back to your lightning wallet. I've been into Bitcoin for a few years, so this is knowledge I've gained over years, all distilled into one easy-to-digest ELI5. I hope it helps you, because if you use it and use lightning, it will benefit everyone on the entire network. Greater adoption is one of the best things happening in the bitcoin space right now. Be warned, lightning can be VERY difficult to use if you self-custody it. When you self-custody, there are sometimes opening and closing fees for lightning channels, which just means you pay more money over time to operate the channels if you don't know what you're doing. I use Strike for custodial lightning in the USA. It's controlled by someone else, but it basically guarantees your Sats are safe and useable whenever you want to use them, no worry about opening or closing channels involved. Good luck, and hopefully, welcome to Bitcoin!

Mentions:#QR#USA

Bitcoins are very divisible. They divide down into 100 million units per coin called satoshis, which are plenty small enough to be useful to buy things like coffee with. Around 1500 will buy a dollar right now and vice versa. You can get and use several types of tap-to-pay or nfc solutions, but most people just use QR codes for this sort of thing. For smaller payments for things such as a cup of coffee, a layer 2 network that references the main network, but has lower transaction fees can optionally be used.

Mentions:#QR

How to you think community driven projects work? There is no paid marketing and no paid callers so how does awareness of the token spread? By community members creating that awareness and adding value. It’s at a market cap of $16m now without advertising. It will go much higher because the community are based af and are out telling people in real life, posting QR codes in different cities around the world, one has got an energy drink at the prototype stage and a 100 other things. Come and check out the Telegram group and you will understand.

Mentions:#QR

I wish there was a way to have a wallet send a transaction to a CEX or any other wallet address, but have it set as a "pending" transaction that will never go through unless you put in a one time password or code into it to "release" the transaction. That way, you could give this to someone or have it in a will, etc for them to enter to have the transaction execute without them having to access the wallet or know private keys. So if I had $100k in BTC sitting in a cold wallet, I could go ahead and enter a wallet address and essentially send the amount but it would never send unless this external password was entered that would tell that one transaction to execute. You would tie that one time password only to that one transaction. I guess it would kind of be the same concept of "signing" the transaction with your cold wallet device (like a safepal QR code, etc) but it would already be signed and just need the password someone else would enter to complete the transaction. You could have the Tx ID entered into a custodial website and then the site could allow the password to be used to release it. Hell, I don't know. I'm probably way off and being completely retarded with this idea......but it never hurts to have wild or "impossible" ideas, right 😂

Mentions:#CEX#BTC#QR

The new cold card Q1 is such a beautiful hardware wallet. Removable batteries , QR scanner for added protection. The goat of HWWs imo thing is perfection

Mentions:#QR

I agree! It has the best features of all the hardware wallet companies: Fully Air gapped with QR codes.. My favorite feature is that you can use the adress explorer, displaying the adress QR to receive funds without ever connecting the device to the internet or any wallet software.

Mentions:#QR

I don´t know if it is really trustless. Raspberry Pi´s have closed source components (Broadcom chips). I think the Krux DIY is fully open source. Anyhow if you never connect the device to the internet I would assume it is save. However a major downside is that you have to keep an unencrypted QR of your seed close to you if you want to do transactions which is definately not optimal. Other signers store your seed encrypted which enabled you to store your backup in a saver location.

Mentions:#QR

I connected my ledger to windows, checked the address in ledger live, scanned its QR directly from the exchange app I meant to send from, and had no issues or concerns. Why would I follow your method? I think not inputting your key on digital devices and checking the network/address is enough.

Mentions:#QR

Copy/Paste and then verify the first 4 and last 4 characters of the address you are sending too. That's more than enough to circumvent address poisoning. In most cases the address you are sending to is either your own private wallet, back to the exchange or a third party via QR code. It's not nearly as unsafe as some people think it is if you are using widely accepted tools, wallets, and exchanges IMO.

Mentions:#QR#IMO

What if your purchased an external wallet? I am not promoting, though I found out about ledger through work. They provide a physical device where you can offload your currencies to a wallet you can store wherever (with the potential to scan QR codes and other features and price points).. hope this helps people! God Bless 🧿🪬🧿

Mentions:#QR

$DIGI, it is under a million in market cap but it looks like something with potential, it could fail like any other projects but it is definitely doing some different things than other coins. It wants to bridge the gap between the digital world and real life at its locations. It has one location so far but wants to be an IRL metaverse and NFT art display entertainment venue that only using QR, AR and crypto.

Post a QR code.

Mentions:#QR

HSBC canada was blocking anything related to crypto,not only buying actual crypto but even assets crypto related like coinbase stocks,mining companies etc... sadly the way around it is to change bank or find a way to pay cash. In canada you can get a QR code from kraken, then go to a post office with cash and show the QR code and deposit cash in the kraken account, there might be a similar thing in cyprus

Mentions:#QR

Any bitcoin wallet that you use has an address and a QR code you can use. You can either put that on your website or just have the customer scan it when they pay. I own a small business also and my problem is I’d like for customers to be able to pay with their credit card, but then the funds are instantly converted to bitcoin and sent to my wallet. I haven’t found anything that does that.

Mentions:#QR

Why is supply chain tracking with blockchain any better than without? It's impossible to guarantee a package or the tracking method on it such as a QR code hasn't been tampered with, poisoning the now immutable data on the blockchain. No different from doing it with a centralized system.

Mentions:#QR

So i scanned the QR code for this but didn’t send anything to the address provided. Am i at risk bc i scanned this?

Mentions:#QR

Bitcoin Well; just provide “an” email address, username, and password, and you’ll be able to buy at any of their ATMs using your account’s QR code to buy non-KYC

Mentions:#QR

Yeah, people sent us tips to the QR code in our movie [Finding Satoshi Nakamoto ](https://www.youtube.com/watch?v=oDcNkggCXRQ)

Mentions:#QR

You can actually achieve the same thing with FUN using Fizenwallet. Instead of needing someone's account details, you can just scan a QR code to send them FUN easily. Also, BTC, LTC

How is accepting payment via crypto for a new business any more simple than say having a PayPal account? Or Stripe integration with your website? Or for example in my country here in Asia most small businesses just have their QR code for their bank account and people just scan the code and pay you directly (no payment terminals or payment processors needed). Honestly thought I am not discounting that there are undoubtedly more benefits I probably haven't thought of...but I just generally think that the benefit of crypto as a currency/payment system is largely dead in countries that have already modernized or advanced banking systems that are easy to use.

Mentions:#QR

Thanks bro!! Got it to work though check this out... The QR scanned from another lap top by turning the laptop screen upside down and pointed the F ker at the ELECTRUM QR scan ..... DONT WORK. I tried it few times. Then typing it in worked fine. That really threw me off. I screen shot the QR codes private keys and ELECTRUM just blinks and nothing happens when trying to scan. So that something to keep in mind. Maybe cause it's a touch screen laptop but I doubt that's got anything to do with it. So again typing it in worked 2nd time around cause I F it up the first time trying to type the DEVIL in. Currently sending Bitcoin to Kraken and from there to the bank. If you have any pointers on that I would much appreciated.

Mentions:#QR#WORK

Blockstream Jade in QR air gapped mode is what I prefer.

Mentions:#QR

Go to the wallet, hit those 3 dots for more settings, and then export/backup. You will see a QR code. That QR is just a representation of the 12 words at the bottom. Write down those 12 words and keep them as a backup. This is your private key. Anyone who has these words will have access to your bitcoin. You can share that if you need the wallet on a different phone. But as stated before, do not keep this on your phone or computer. Bitcoin is a bearer asset with these words. You will be stolen from if any device is compromised. And keep these words safe in case you lose your phone. No, you won't need blue wallet specifically. It is a BIP39 standard. As long as the wallet supports BIP39 you will be good. Most good wallets do.

Mentions:#QR#BIP

$KIN Fully circulating supply Code Wallet allows for fee less instant transfers with visual ‘QR code’ or link Runs on top of Solana (even if down) as an L2 with anonymity Multiple SDKs available to integrate with websites Enables micropayments as low as 5 cents !

Mentions:#KIN#QR

Exactly. Don’t all wallets have an address check? Meaning if it wasn’t an address it won’t send. And there is almost 0 chance to fat finger an address with another. Also, who types addresses these days? We have QR codes.

Mentions:#QR

Why do you still test transactions before sending? I know this was a thing sometime ago, but things got much much better now. I send to QR codes 99.9% of the time.

Mentions:#QR

I got 2 lap tops both new hardly ever connected to internet if ever. I don't even want to update the windows since I use them for live music. How ever I already sweep the paper wallet with Electrum. I had some issues with scanning QR codes generated by bitaddress .org by turning my laptop screen upside down and trying to scan it in with the other lap top. It would scan but the NEXT button would be grayed out so that force me to try sweeping. Which I did and then QR codes didn't work again until it suddenly work by typing it in. Strange thing is people are talking about the wait period is so long so I chose 10 blocks which took around 5min to transfer fair bit of money. for 43 CAD. Should of chosen 25 that would probably take 10 15 min and the cost was 13 CAD but here on reddit they talking about something like 250 min and so on. Make u s..t your pants. It's either old post or things have changed since then. My paper wallet is at least 8 years old. Was another guy on Reddit who said the same thing as you and the QR scanning stopped me from importing the key. I tried few times and maybe it would work if I just printed on paper instead of trying to scan it in from another laptops monitor. Next step is to send it to Kraken.

Mentions:#QR#CAD

Thank you!! But go it to work but check this out. When I use QR code it don't work. What i did is put of line lap top took a screen shot and then scan it in to the other computer and nothing happens so when I typed it in manually then it work OK. I tried few times to scan the QR code but maybe using laptop screen to scan the QR of it maybe got some issues with that . If it was printed paper then maybe it would work. So That's resolved but luckily I typed it in (Pain in the S). Cause I been doing it all day cause of other reasons. So now it works and I can see the balance and asking how many blocks I want for the fee so I'm choosing between 10 or 5 . But here is the thing 5 blocks and 10 blocks are the same price which are reasonable price but somethings tells me if I choose 5 the price will change later lol. So I'm leaning for 10 to be safe unless they giving discount on 5 making it the same price as 10. Sound like trap. lol. Thanks for the Decrypt info. It really helped Cause I been wondering why no app is asking for the passphrase lol just the private key. But now I know you have to do as you suggested going back to Bitaddress and do the Decrypt there. Any suggestions on how many blocks should I choose for transaction fee and someone said that after you broadcast he was charged a lot of money $450. Probably his moving s..t load of money.

Mentions:#QR#OK

Depending on how tech savvy you are, for hardware wallets, Tangem is simple, secure and cheap. In its easiest setup, you don't know your seedphrase (you can if you want). You just have 3 credit cards. In the middle are simple wallets like Trezor or Ledger. You use usb cables to sign transactions so you are briefly connected to the internet. Most complex and expensive, but most secure are airgapped wallets like Cold Card or Keystone. You sign transactions via SD card or QR codes and are never connected to the internet.

Mentions:#SD#QR

Thanks. So I reply to you earlier and erase my comment cause now I arrived at that stage you mentioned above. So bitaddress OFF line. Asks for the private key that's on my printer paper from years ago. So I type it and ask for phaseword and then I hit DECRYPT as you mentioned... and the spits out different bitcoin addresses 1Private key WIF and Private Key WIF Compressed QR codes plus binary. That's what the Blockchain.coms wants Compressed private key. I could go there right now like man that I am but since you said no it's a no go BUT if I got to ELECTRUM in sweep option. If I scan or even type those two private keys that it spit out earlier only Compressed key works but nothing happens. Just blinks and I didn't receive anything in my Electrum wallet. I know for sure I used the passphrase which I wrote down and all of this should be working but for some reason it dont work in ELECTRUM. Kinda confused here. Do you think passphrase is wrong?

Mentions:#WIF#QR

I haven’t used the QR code part of it cause I honestly just didn’t understand it. Only thing I don’t like is that I have to keep my seed on a flimsy piece of paper 

Mentions:#QR

It's still unlikely that it will be banned / made illegal. There's always the issue of jurisdiction too - where would it be banned? How do you trade with other countries where it's not banned? Also a thing to consider is it can be banned but such a law would be unenforcable. You can literally roll dice to create a wallet and print QR codes on paper to recieve.

Mentions:#QR

What legit use dwarfs the illicit drug trade on the bitcoin network? Who are these vendors accepting enough bitcoin for your statement to be true? The off brand convenience store down the street that has a “pay with bitcoin” QR code next to the 5hr energy drinks by the register? There is no Amazon or Walmart that takes it. Major retailers don’t deal with it at all. So how is it possible that legit uses offset just the Sinaloa cartel alone?

Mentions:#QR

Update: found a work around via wifi disablement before scanning alternative address QR code, then set the transaction up for review, and enable wifi before spending/sending. Issue now is that the broadcasting will not complete, and no troubleshooting is available. Additionally, blue wallet will only create a for viewing only copy of the samouri wallet, even though the recovery code is used. Options? Unsure.

Mentions:#QR

You are correct, I used the word seed phrase without realising this. It would have just been my Bitcoin core wallet password that I seem to remember using Bitcoin core to generate a 512bit or character password then using a QR code generator to store the info. I might have been just using a random character generator but the built in 512 bit thing really hangs in my memory somehow. The thought of needing the .dat file in addition to password makes me realise how far we've come.

Mentions:#QR

> Bitcoin used to be this cool concept where I'd convert my seed phrase to a QR code and store under my bed. Not 12 years ago it wasn't. Seed phrases were introduced in Septemper 2013.

Mentions:#QR

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Mentions:#QR

Hahaha, I have enough where I'll never be poor. Have realised it's enough to not trust others or hardware wallets with its security. It's really humbling to see how little Bitcoin core has changed. Yet everything else got so complicated. Bitcoin used to be this cool concept where I'd convert my seed phrase to a QR code and store under my bed. Address validation wasn't a thing and it's was easy to lose funds. It peaked around $120 bucks and everyone I talked to about it thought it was in a bubble! I remember this Russian exchange (btc-e) and chat box with a user 'fontas' who used to pump feathercoin like night and day. Didn't know it at the time big he must have been an OG whale. Can't say I didn't make a bit of money on those pumps... Wonder where he is now? Times changed and companies saw an opportunity to simplify custody and made it easier, but we seem to have come full circle and now 3rd party is risky again. Feels good to fire this up and dedicate a PC to protecting my generational wealth. Not only am I taking it all into my own hands but the memories from a decade ago it's made me remember from another life is really cool. Keep stacking mate, we can't rewind the clock and I made plenty of mistakes along the way. But it's the lessons we learn and people we meet that's important. God speed!

Mentions:#QR#PC

$VELO are about to launch Orbit, their crypto payment super app that'll be installed across thousands of retailers, with the aim of getting over 500,000 merchants on board before the end of 2024! This is a game changing, mass adopting Web3+ crypto payment solution for the everyday person. Launching in Thailand where the vast majority of the population already uses QR code payment options in their everyday lives, $VELO plan implement Orbit across neighbouring SE Asian economies before a global launch campaign. We are witnessing the early stages of a globally recognised name that'll dominate the industry for decades to come. This is just 1 or many products for the Velo labs team. You are early. You do not have enough $VELO

Mentions:#VELO#QR

$VELO are about to launch Orbit, their crypto payment super app that'll be installed across thousands of retailers, with the aim of getting over 500,000 merchants on board before the end of 2024! This is a game changing, mass adopting Web3+ crypto payment solution for the everyday person. Launching in Thailand where the vast majority of the population already uses QR code payment options in their everyday lives, $VELO plan implement Orbit across neighbouring SE Asian economies before a global launch campaign. We are witnessing the early stages of a globally recognised name that'll dominate the industry for decades to come. This is just 1 or many products for the Velo labs team. You are early. You do not have enough $VELO

Mentions:#VELO#QR

This is true but I created this sheet for quick reference of many public addresses with QR codes without the need to open an app. This could be export as a PDF and stored on the desktop or whatever. And more importantly this is useful to manage multiple bip 84 child accounts index numbers for organization.

Mentions:#QR

“I’ll sell when I can buy milk and eggs with a QR code” Realest shit I read today 🔥🔥🔥💯💯

Mentions:#QR

doh, sorry. I'd be full of crap if I tried to have an encryption dialogue with you. I follow/read macro articles by nsa/ibm/etc and follow the news, but am in no way qualified to talk about schemes or specific tech. I know QR is a big deal in the government right now, so I try to pay attention to it.

Mentions:#QR
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