The official BitcoinPaperWallet.com thread -- updates and news.

[CoinHoarder]

I bet someone at Defcon could probably do it. They seemed to have no problem compromising Casascius coins which are probably considered the most secure/safe physical cryptocoins in existence.

IMO no physical variation of cryptocoins is 100% secure. The security measures and tamper evident properties will be broken over time as new technologies are developed and implemented. That's part of the reasons I probably won't sell "loaded" coins in my physical cryptocoin project, only customer funded/assembled coins. I don't want anyone to get the idea that I personally back the coin's worth if they are factory loaded and appear to have not been tampered with.

The truth is I cannot stop people from tampering with the coins after they leave my hands. As with all physical cryptocoins, it comes down to trusting the person you're buying the coins from that they haven't tampered with it... no matter what security measures are implemented or how reputable the company is that makes them.

[callem]

Perfect design. Best paper wallet I've seen by far.

Tip: Print on 10mil teslin for a 100% waterproof (inkjet) and durable wallet. Much more opaque than paper so shining light through isn't an issue either.

Any chance of adding optional BIP38 support for added security?

[canton]

Perfect design. Best paper wallet I've seen by far.

Tip: Print on 10mil teslin for a 100% waterproof (inkjet) and durable wallet. Much more opaque than paper so shining light through isn't an issue either.

Any chance of adding optional BIP38 support for added security?

Thanks for the kind words. Yes, Teslin synthetic paper rocks. I've been comparing about 3 different brands and so far Teslin is my favorite for this application. I've been thinking about adding BIP38, possibly with this different layout/design:



As I understand it, a folding/tamper-evident BIP38 design doesn't make a whole lot of sense since -- if BIP38 holds up the way we hope it does -- you can share a BIP38 encrypted private key with the whole world and it doesn't matter.

[canton]

Announcing the holiday design of this wallet. Enjoy!

https://bitcoinpaperwallet.com/holiday-design/

[JohnnyBrown]

Hey, Canton.

May I ask approximately how many wallets can fit in one bag (the ones in your website)?

Just curious as I might colour-code the wallets by sticker colour.

[StarfishPrime]

The BIP 38 wallet design above is great, especially the matching, numbered private key for a safe deposit box etc.

An option for the "old" design, with a sealed encrypted key would be good too. Anyone with physical access to the wallet might have a better than random chance at guessing the owner's password, or could just snap a picture of it and run a dictionary attack at their convenience.

The xmas themed wallet is very nice!
 

[emp3000]

Hello, canton, on which version of bitaddress is the current bitcoinpaperwallet site based?? THank you very much

[seanneko]

Hey, Canton.

May I ask approximately how many wallets can fit in one bag (the ones in your website)?

Just curious as I might colour-code the wallets by sticker colour.

I have 10 of them in my bag (the free one that came with the stickers) and there's heaps of spare room. I think you could probably get 50 in there, maybe even more.

[emp3000]

Hey, Canton.

May I ask approximately how many wallets can fit in one bag (the ones in your website)?

Just curious as I might colour-code the wallets by sticker colour.

I have 10 of them in my bag (the free one that came with the stickers) and there's heaps of spare room. I think you could probably get 50 in there, maybe even more.

Are you fairly secure about the paper wallets not being hacked?  Did you deposit only one time per paper or did you do a sample amount first before every paper?

[seanneko]

Are you fairly secure about the paper wallets not being hacked?  Did you deposit only one time per paper or did you do a sample amount first before every paper?

I have not looked at the source code. However, I ran the generator offline on an airgapped computer and printer (has never been connected to the Internet, and never will be even in the future). So unless there is an obvious exploit in the code I trust that it's secure.

I didn't do sample deposits. My reason for having 10 wallets rather than one big one is that in the incredibly small chance that someone has an address collision with me (yeah I've seen all the graphs showing how small the odds are), I'd rather they only take 10% of my money rather than 100%.

[canton]

Hello, canton, on which version of bitaddress is the current bitcoinpaperwallet site based?? THank you very much

Hi there,

As of today, the latest version of bitcoinpaperwallet.com is December 3, and it folds in some of the changes apparent in the very latest bitaddress.org (v2.6.5) -- however there are two significant differences:

1) For simplicity, I don't include many of extra features of bitaddress.org (brain wallets, bulk wallets, BIP38)

2) I do include a potentially stronger random number generator, provided you are using a modern enough browser. (Mostly anything but IE.) bitaddress will likely fold this RNG into their code soon, there's already a change request in place.

[nanobtc]

Canton/all, is there a list of settings for various printers? I love the wallets, but the calibration process is quite slow on the printer I am using (Brother 4040). As soon as I get it tweaked in, I will offer the Zoom/Horizontal that worked.

[toroidmonster24]

I think BIP38 is the last thing I need. I don't have access to a printer at home so I need to print it out at work. Even though I'm fairly confident no one will suddenly find ONE PDF of the thousands of pages that get printed a day with my private key, it's still better if it's encrypted. Plus, this way I feel better about having multiple backups, such as storing a PDF version.

[charleshoskinson]

Canton, I justed wanted to give you a heads up that I'm mentioning your website and wallet in the CSL refresh coming out next week. You might get a really big spike in traffic (we have almost 15,000 students).

[canton]

Canton/all, is there a list of settings for various printers? I love the wallets, but the calibration process is quite slow on the printer I am using (Brother 4040). As soon as I get it tweaked in, I will offer the Zoom/Horizontal that worked.

Hi,

Just this week I adjusted the software so that it starts to automatically set the zoom/shift for known combinations of browsers and operating systems. Unfortunately, I can't auto-detect printers, so that's always going to be up to you. If I get enough feedback from folks, I'll definitely put together a searchable database.

[canton]

Canton, I justed wanted to give you a heads up that I'm mentioning your website and wallet in the CSL refresh coming out next week. You might get a really big spike in traffic (we have almost 15,000 students).

Thanks both for the mention and the heads up. BTW you might contact me privately to stay on top of what's brewing this week: a live-boot ubuntu CD with the bitcoinpaperwallet.com software pre-installed on the desktop. Should substantially simplify printing safe paper wallets, even for people who aren't used to linux.

[charleshoskinson]

Send me your contact details:

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[canton]

Send me your contact details:

Hi Charles. My email, PGP public key etc. are all at http://cantonbecker.com

[charleshoskinson]

Sent an email

[emp3000]

Hello, canton, on which version of bitaddress is the current bitcoinpaperwallet site based?? Thank you very much

Hi there,

As of today, the latest version of bitcoinpaperwallet.com is December 3, and it folds in some of the changes apparent in the very latest bitaddress.org (v2.6.5) -- however there are two significant differences:
1) For simplicity, I don't include many of extra features of bitaddress.org (brain wallets, bulk wallets, BIP38)
2) I do include a potentially stronger random number generator, provided you are using a modern enough browser. (Mostly anything but IE.) bitaddress will likely fold this RNG into their code soon, there's already a change request in place.

WOW. Now if my last question is stupid, forgive me - so what if all of us printed, moved our mouse and generated addresses OFFLINE, is there any chance that this webapp generate an identical address keypair that already exists out there? How will it countercheck the newly gen. address with an existing one?

Thank you very much and more prosperity may come your way.