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Originally Posted by Alexander
Imagine, you can store your private key of some sensitive data into your fingernail! Noone would ever come to the idea of using YOUR fingernail for decrypting your data. Well at least until now when it was slashdotted. But how much really is 5 mega bits? 5000 bits / 8 = 625 bytes. That is more than enough to hold a larger 512 bytes private key of an RSA encryption which noone has officially been able to crack yet (though I wouldn't recommend anything below 1024 bytes nowadays).
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The main problem with this is that if you are ever incarcerated or arrested, they have the key that they can take to decrypt any of the data you encrypt with it. IMHO, a bad move. This is precisely why you should use at least a 2-factor system (Something you have [fingernail], Something you know [passphrase]).
As long as you are strong-willed and can resist interrogation, you can keep them from getting at your data. Nothing can keep them from taking the data or key from your fingernail (well, except that it is considered "property", and they aren't legally allowed to take it until/unless you waive your rights to your property... which of course you should
NEVER do, and this includes fingerprints).
Er, I mean... I read that somewhere once... yeah, thats it. <grin>