Topic: Publicly released some of the magic potion that goes into physical bitcoins! - page 3. (Read 9235 times)
December 06, 2012, 02:31:35 AM
Yay! Your roll-your-own coins just got a bit more valuable... Not that I don't trust you, but I prefer not needing to
December 06, 2012, 02:27:48 AM
Nice. Thank you.
December 06, 2012, 02:22:45 AM
I just released some of the magic that goes into physical bitcoins: a generator for those little round key circles I put in my coins.
How it works:
1 - download latest Casascius Bitcoin Address Utility (either on github, or https://casascius.com/btcaddress-alpha.zip)
2 - generate some keys
3 - print physical bitcoin inserts!
I made it so you can generate key circles with Minikeys, regular keys, or two-factor Encrypted Private Keys. Minikeys are 30 characters and fit in a single circle. Regular keys are 51 characters and two-factor encrypted ones are 58 characters, these print on a two-circle shape that you fold in half.
Each sheet gives you 8 keys, and gives you a QR code for the bitcoin address.
I added one more thing, and that's something called "confirmation codes". A confirmation code lets someone who ordered a two-factor passphrase physical bitcoin verify that the address they were given is really protected by their passphrase, without giving them access to the funds. So... I can sell a two-factor physical bitcoin with YOUR passphrase, and also give you back a "confirmation code" that allows you to independently calculate the bitcoin address that went inside your product. It allows you to prove that I didn't just give you an address of my own.
Of course, with this generator, the genie is out of the bottle, and you could create your own physical bitcoins yourself.
How it works:
1 - download latest Casascius Bitcoin Address Utility (either on github, or https://casascius.com/btcaddress-alpha.zip)
2 - generate some keys
3 - print physical bitcoin inserts!
I made it so you can generate key circles with Minikeys, regular keys, or two-factor Encrypted Private Keys. Minikeys are 30 characters and fit in a single circle. Regular keys are 51 characters and two-factor encrypted ones are 58 characters, these print on a two-circle shape that you fold in half.
Each sheet gives you 8 keys, and gives you a QR code for the bitcoin address.
I added one more thing, and that's something called "confirmation codes". A confirmation code lets someone who ordered a two-factor passphrase physical bitcoin verify that the address they were given is really protected by their passphrase, without giving them access to the funds. So... I can sell a two-factor physical bitcoin with YOUR passphrase, and also give you back a "confirmation code" that allows you to independently calculate the bitcoin address that went inside your product. It allows you to prove that I didn't just give you an address of my own.
Of course, with this generator, the genie is out of the bottle, and you could create your own physical bitcoins yourself.
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