I was mainly trying to show that Bitcoins can be hidden in short amounts of plain text. Any text will do, as long as it's not too short that it can be guessed by brute force.
Yeah, that's actually pretty neat.
I've been doing it the other way round, i.e. starting with a specific address and key and then obfuscating the key somehow. It hadn't occurred to me to start with some convenient text and then generate a private key and public address from that.
Hey Casascius you could include in your business creating public/private keys on paper based on a specific passphrase. I don't know how popular that would be, although there is no real difference in the trust involved.
I think I prefer my unbreakable
one-time code. Apart from the slight problem that I don't know of a simple way for someone not a computer genius to get their bitcoins out again.