and its going on 100% cotton stock. 
Topic: The official BitcoinPaperWallet.com thread -- updates and news. - page 8. (Read 55957 times)
It's water resistant pigment based ink and its going on 100% cotton stock.
and its going on 100% cotton stock. You actually encouraged me to order ink cartridges (refills with reset chips actually) for a long unused inkjet printer, and some good stock.
Be wary - inject printer ink has a finite and relatively short life (can be as short as a few years). Don't use inkjet unless you know the ink is long lasting, or only for temporary wallets.
You actually encouraged me to order ink cartridges (refills with reset chips actually) for a long unused inkjet printer, and some good stock.
If I could make one small suggestion, put a web address somewhere on the template for basic instructions, so I can give to a newbie and they can learn everything they need to, like bitcoin.org or whatever.
Jinx. I just did that -- literally -- 10 minutes ago.
See the bottom right of the notes/deposit area:
https://bitcoinpaperwallet.com/bitcoinpaperwallet/images/back-300dpi.jpg
- Canton
PS: If you haven't yet voted on your favorite open source bitcoin paper wallet design, hurry up, voting is ending soon!
https://tricider.com/en/brainstorming/poxx
This is a really cool thread, idea, and execution. I may have use for these in the near future
If I could make one small suggestion, put a web address somewhere on the template for basic instructions, so I can give to a newbie and they can learn everything they need to, like bitcoin.org or whatever.
If I could make one small suggestion, put a web address somewhere on the template for basic instructions, so I can give to a newbie and they can learn everything they need to, like bitcoin.org or whatever.
Also on the other side of the paper too, behind the actual private key.
For fun, maybe instead of QR codes, random dot stereograms
Seriously though, I thought of doing bogus QR codes but I was afraid of usability issues for novices... maybe if there's a real obvious "NOT HERE" type mark. I'll think about this some more. 
Also on the other side of the paper too, behind the actual private key.
I'd do something like this, where the middle two QR codes are actually randomly generated nonsense data.
This. Great idea. I'd also add some message on the bogus codes to avoid confusion:
I'd do something like this, where the middle two QR codes are actually randomly generated nonsense data.
I believe this is why the textual private keys aren't lined up so any damage will damage different parts of the key. See http://i.imgur.com/4Pmh5lp.jpg ( grr, had the wrong link here before I decided to remove the half letters to simulate more damage ) -- [ printed wallet, cut the flap in half, and removed any half letters ( simulating a pretty huge space of damaged textual key -- and honestly, I really doubt damages from a fold will damage exactly one letter ) ] -- QR code removed because I'm feeling silly and have 0.05BTC sitting on that address if anyone can recover the private key.
I'm re-reading this and now I'm undecided. I first thought it was a bounty. Is it?
Well, it *was*: https://blockchain.info/address/15mNseGxoTxq3yWeR6utULoeQdWuJYSgNy
Okay. That was me. I just wanted to make sure I was actually allowed to steal it. But I guess I'm derailing this thread a bit. Sorry.
I believe this is why the textual private keys aren't lined up so any damage will damage different parts of the key. See http://i.imgur.com/4Pmh5lp.jpg ( grr, had the wrong link here before I decided to remove the half letters to simulate more damage ) -- [ printed wallet, cut the flap in half, and removed any half letters ( simulating a pretty huge space of damaged textual key -- and honestly, I really doubt damages from a fold will damage exactly one letter ) ] -- QR code removed because I'm feeling silly and have 0.05BTC sitting on that address if anyone can recover the private key.
I'm re-reading this and now I'm undecided. I first thought it was a bounty. Is it?
Well, it *was*: https://blockchain.info/address/15mNseGxoTxq3yWeR6utULoeQdWuJYSgNy
First of all and I say this again... GREAT JOB!!!
I love the design and your website is great too!
Now to the constructive criticism:
I made my first paper wallet using your web site. There are no concerns there, it worked flawlessly, I used Safari and I used an ink-jet printer and the design is a work of art but I printed the wallet in photo/presentation paper which it's not a problem since I figured the paper is sturdy, makes the design look better and I believe it's more durable. That being said, the paper is not designed to be folded!!! to my surprise, the paper slightly broke when I folded (see photo here https://dl.dropboxusercontent.com/u/72382452/Photo%20Apr%2023%2C%2012%2038%2031%20PM.jpg)
So my concern is the private key in the inside of the fold. Could you find a gracious way to split the private key so the folding area does not tamper with the characters? I'm concerned about the folding messing with the characters and making them unreadable.
I'm sure this issue is not only associated to photo paper but any kind of paper since the fibers are broken when you fold a piece of paper.
I know the QR code is fine, but I'd feel better having redundancy (QR & actual private key)
Anyways, my 2cts for your design.
Great work again!
I love the design and your website is great too!
Now to the constructive criticism:
I made my first paper wallet using your web site. There are no concerns there, it worked flawlessly, I used Safari and I used an ink-jet printer and the design is a work of art but I printed the wallet in photo/presentation paper which it's not a problem since I figured the paper is sturdy, makes the design look better and I believe it's more durable. That being said, the paper is not designed to be folded!!! to my surprise, the paper slightly broke when I folded (see photo here https://dl.dropboxusercontent.com/u/72382452/Photo%20Apr%2023%2C%2012%2038%2031%20PM.jpg)
So my concern is the private key in the inside of the fold. Could you find a gracious way to split the private key so the folding area does not tamper with the characters? I'm concerned about the folding messing with the characters and making them unreadable.
I'm sure this issue is not only associated to photo paper but any kind of paper since the fibers are broken when you fold a piece of paper.
I know the QR code is fine, but I'd feel better having redundancy (QR & actual private key)
Anyways, my 2cts for your design.
Great work again!
I believe this is why the textual private keys aren't lined up so any damage will damage different parts of the key. See http://i.imgur.com/4Pmh5lp.jpg ( grr, had the wrong link here before I decided to remove the half letters to simulate more damage ) -- [ printed wallet, cut the flap in half, and removed any half letters ( simulating a pretty huge space of damaged textual key -- and honestly, I really doubt damages from a fold will damage exactly one letter ) ] -- QR code removed because I'm feeling silly and have 0.05BTC sitting on that address if anyone can recover the private key.
I'm re-reading this and now I'm undecided. I first thought it was a bounty. Is it?
First of all and I say this again... GREAT JOB!!!
I love the design and your website is great too!
Now to the constructive criticism:
I made my first paper wallet using your web site. There are no concerns there, it worked flawlessly, I used Safari and I used an ink-jet printer and the design is a work of art but I printed the wallet in photo/presentation paper which it's not a problem since I figured the paper is sturdy, makes the design look better and I believe it's more durable. That being said, the paper is not designed to be folded!!! to my surprise, the paper slightly broke when I folded (see photo here https://dl.dropboxusercontent.com/u/72382452/Photo%20Apr%2023%2C%2012%2038%2031%20PM.jpg)
So my concern is the private key in the inside of the fold. Could you find a gracious way to split the private key so the folding area does not tamper with the characters? I'm concerned about the folding messing with the characters and making them unreadable.
I'm sure this issue is not only associated to photo paper but any kind of paper since the fibers are broken when you fold a piece of paper.
I know the QR code is fine, but I'd feel better having redundancy (QR & actual private key)
Anyways, my 2cts for your design.
Great work again!
I love the design and your website is great too!
Now to the constructive criticism:
I made my first paper wallet using your web site. There are no concerns there, it worked flawlessly, I used Safari and I used an ink-jet printer and the design is a work of art but I printed the wallet in photo/presentation paper which it's not a problem since I figured the paper is sturdy, makes the design look better and I believe it's more durable. That being said, the paper is not designed to be folded!!! to my surprise, the paper slightly broke when I folded (see photo here https://dl.dropboxusercontent.com/u/72382452/Photo%20Apr%2023%2C%2012%2038%2031%20PM.jpg)
So my concern is the private key in the inside of the fold. Could you find a gracious way to split the private key so the folding area does not tamper with the characters? I'm concerned about the folding messing with the characters and making them unreadable.
I'm sure this issue is not only associated to photo paper but any kind of paper since the fibers are broken when you fold a piece of paper.
I know the QR code is fine, but I'd feel better having redundancy (QR & actual private key)
Anyways, my 2cts for your design.
Great work again!
I believe this is why the textual private keys aren't lined up so any damage will damage different parts of the key. See http://i.imgur.com/4Pmh5lp.jpg ( grr, had the wrong link here before I decided to remove the half letters to simulate more damage ) -- [ printed wallet, cut the flap in half, and removed any half letters ( simulating a pretty huge space of damaged textual key -- and honestly, I really doubt damages from a fold will damage exactly one letter ) ] --
The calibration didn't align the front and back 100%. I used Zoom: 3, Shift: 7 if that helps anybody else.
With any combination of zoom/shift settings, did you manage to get the calibration page to print out perfectly *centered* (horizontally centered, that is?) That's the factor that influences how accurately the front/back line up. For zoom 3 / shift 7, what browser / OS were you using?
If anyone reading this thread is scratching their heads, this is what we're talking about:
http://i.imgur.com/fZlxoaK.png
So far I've had the best success with Safari, pretty good with Firefox & IE, possibly some problems with Chrome.
Any chance there will be an option to specify the size? Would that mess up the Zoom/Shift settings? I think it would be cool to have it the same size as paper currency, but I suppose paper currency has different sizes throughout the world.
Not yet. I'll think about that some, like a "master zoom" function. However the resulting wallets wouldn't size properly for the tamper-evident tape I sourced -- so you'd be obligated to use regular tape.
Using Chrome / Windows 8 printing on a HP CLJ, the zoom and shift didn't seem to do anything at all, but the extra bleed on the back was adequate to make it a reasonable fit, here is the bleed after been cut with the details from the calibration page behind, maybe it just needs extending on that leading edge at the right of the picture
http://i.imgur.com/MfDirzr.jpg?1
The calibration didn't align the front and back 100%. I used Zoom: 3, Shift: 7 if that helps anybody else.
With any combination of zoom/shift settings, did you manage to get the calibration page to print out perfectly *centered* (horizontally centered, that is?) That's the factor that influences how accurately the front/back line up. For zoom 3 / shift 7, what browser / OS were you using?
Chrome / Windows 8.
So far I've had the best success with Safari, pretty good with Firefox & IE, possibly some problems with Chrome.
I'll see if I can try another browser soon.
Not yet. I'll think about that some, like a "master zoom" function. However the resulting wallets wouldn't size properly for the tamper-evident tape I sourced -- so you'd be obligated to use regular tape.
It was just a thought. It may not be doable. It's awesome as is
Since carrying it around in your wallet sort of defeats the purpose, my thought is probably bad, but maybe a function then to print a "public" bill that has only the public key and doesn't fold... that way you can carry it around without worrying that your funds will be stolen, even if your (physical in real life) wallet is. Both (the "secret" bill and "public" bill) would be able to print on one sheet of paper. Anyway, just spitballing. I think it's really cool already. Cheers!
#1: Today I soft-launched https://bitcoinpaperwallet.com which not only provides the wallet generator (in-browser two-sided printing) but also features security tips, and allows you to purchase custom holograms using bitcoin. Wallet generator is open-source and can run entirely offline as it's based on bitaddress.org.
Looks great. Can't wait to print some.
Another security idea is to use a printer which support on-site Printing, eg you put a Picture or PDF on a USB or SD card, and then you print with the printer "stand alone".
Many printers today have the capatibility to print files from a USB or SD card.
Since the computer cannot know which off-line stand-alone printer you use, the risk of getting a "fake firmware update" is negligible. Many printers also have a sequence that needs to be triggered Before it will accept a firmware upload via USB/SD, so its completely secure. For example Power on the printer with the firmware update USB/SD inserted. So never turn on the printer with a SD or USB inserted to be on the safe side.
For a leak to sucessfully travel from your printer to internet, the printer would have to "infect" the usb with a autorun software containing the private key AND a "payload" that transmits the private key home. And for such infection to exist in the printer, it would have to travel from computer to printer via USB/SD, and for that to happen, the printer must be able to receive software updates arbitary via USB and the computer needs to know the exact model of your printer.
Many printers today have the capatibility to print files from a USB or SD card.
Since the computer cannot know which off-line stand-alone printer you use, the risk of getting a "fake firmware update" is negligible. Many printers also have a sequence that needs to be triggered Before it will accept a firmware upload via USB/SD, so its completely secure. For example Power on the printer with the firmware update USB/SD inserted. So never turn on the printer with a SD or USB inserted to be on the safe side.
For a leak to sucessfully travel from your printer to internet, the printer would have to "infect" the usb with a autorun software containing the private key AND a "payload" that transmits the private key home. And for such infection to exist in the printer, it would have to travel from computer to printer via USB/SD, and for that to happen, the printer must be able to receive software updates arbitary via USB and the computer needs to know the exact model of your printer.
+1
Brilliant!
Offline computer using Chrome printing to PDF... PDF saved to SD card... SD card inserted in printer.
The calibration didn't align the front and back 100%. I used Zoom: 3, Shift: 7 if that helps anybody else.
With any combination of zoom/shift settings, did you manage to get the calibration page to print out perfectly *centered* (horizontally centered, that is?) That's the factor that influences how accurately the front/back line up. For zoom 3 / shift 7, what browser / OS were you using?
If anyone reading this thread is scratching their heads, this is what we're talking about:
So far I've had the best success with Safari, pretty good with Firefox & IE, possibly some problems with Chrome.
Any chance there will be an option to specify the size? Would that mess up the Zoom/Shift settings? I think it would be cool to have it the same size as paper currency, but I suppose paper currency has different sizes throughout the world.
Not yet. I'll think about that some, like a "master zoom" function. However the resulting wallets wouldn't size properly for the tamper-evident tape I sourced -- so you'd be obligated to use regular tape.
Very cool! Works well.
The calibration didn't align the front and back 100%, but it probably has to do with the printer rather than the design. I just had to cut the edge a little closer. All this did was uncenter the Bitcoin symbol over the private key, although it was entirely visible. I used Zoom: 3, Shift: 7 if that helps anybody else.
Any chance there will be an option to specify the size? Would that mess up the Zoom/Shift settings? I think it would be cool to have it the same size as paper currency, but I suppose paper currency has different sizes throughout the world.
Great stuff
The calibration didn't align the front and back 100%, but it probably has to do with the printer rather than the design. I just had to cut the edge a little closer. All this did was uncenter the Bitcoin symbol over the private key, although it was entirely visible. I used Zoom: 3, Shift: 7 if that helps anybody else.
Any chance there will be an option to specify the size? Would that mess up the Zoom/Shift settings? I think it would be cool to have it the same size as paper currency, but I suppose paper currency has different sizes throughout the world.
Great stuff
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