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PaperCoin - paper offline Bitcoin wallets

papercoin.org

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Re: PaperCoin - paper offline Bitcoin wallets

#11

Post by stickac »

sltkr wrote: post #8
subway wrote: post #4

Earlier quoted context omitted.

This appears to generate the wallet in your browser, so the key is never sent over HTTP. That said, I still have difficulty trusting hobby crypto.

That's true, but the code that generates the wallet is still sent over HTTP, so there is an opportunity for an attacker to insert malicious code. It would be a lot better if this was served over HTTPS, but then you still need to trust the author.

You can still download the code (as ZIP archive from github) and run it locally.

Re: PaperCoin - paper offline Bitcoin wallets

#12

Post by stickac »

DoubleMalt wrote: post #10
nwh wrote: post #7

Earlier quoted context omitted.

The generation could still be deterministic in some way. I haven't looked over the code yet, so I don't know. Even if it is securely created, there's nothing stopping the code being modified to some clients.

It would be neat to have something like this as JS application. Of course again you have to check the code or trust the author, but I think an audit would be possible.

This of course is JavaScript application. And it is downloadable and locally runnable (read footer on the website).

Re: PaperCoin - paper offline Bitcoin wallets

#13

Post by gojomo »

Note that http://bitaddress.org was the pioneer in this field.

Bitaddress.org has more options, and includes all necessary code in a single .HTML file. So if you download it to run it locally/offline -- as you should -- whether you grab it from your browser, or from the Bitaddress github project, there's just one file and hash to check against the published hash from others who have reviewed the code.

Papercoin adds the 'printer' graphics and the folding-friendly layout, but trust should be the top quality in any such utility, since private key secrecy is everything.

Re: PaperCoin - paper offline Bitcoin wallets

#14

Post by stickac »

zrail wrote: post #2

Safari gets redirected to a URL like this: blob: http://papercoin.org/some-big-hash This, of course, doesn't work. When I try to remove the "blob:" it throws a 404. Edit: works in Chrome, just not in Safari. Neat idea!

It seems this is a bug in jsPDF - the same happens with their basic example. I might look into that, but for now please use Chrome/Firefox.

Re: PaperCoin - paper offline Bitcoin wallets

#15

Post by shazow »

There seems to be some confusion about this project, so I'll try to explain: PaperCoin creates paper Bitcoin gift cards. You put money on the address, then you give the private key to whoever, and now they own the wallet. (Correct me if I'm wrong, I'm not the author.)

It all happens client-side using jsPDF, and you can run it locally by downloading the .zip in the footer.

It's really not meant to replace any financial infrastructure. It's just a novelty thing. Don't use this to store your life's savings, or anything unless you understand the risks. Who knows, maybe it will inspire the next person build something cool in a further direction.

I like it. The design is pretty swell too. Good job.

Re: PaperCoin - paper offline Bitcoin wallets

#18

Post by DoubleMalt »

stickac wrote: post #12
DoubleMalt wrote: post #10

Earlier quoted context omitted.

It would be neat to have something like this as JS application. Of course again you have to check the code or trust the author, but I think an audit would be possible.

This of course is JavaScript application. And it is downloadable and locally runnable (read footer on the website).

Great! Sorry for not checking.

Re: PaperCoin - paper offline Bitcoin wallets

#20

Post by mlbmlb »

stickac wrote: post #14
zrail wrote: post #2

Safari gets redirected to a URL like this: blob: http://papercoin.org/some-big-hash This, of course, doesn't work. When I try to remove the "blob:" it throws a 404. Edit: works in Chrome, just not in Safari. Neat idea!

It seems this is a bug in jsPDF - the same happens with their basic example. I might look into that, but for now please use Chrome/Firefox.

In Opera it opens a new tab with: papercoin.org/undefined
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