17 Dec
2003
17 Dec
'03
11:17 p.m.
know = 100% objective certainty Well, OTP gives you this. Probabilistic encryption does too, I think (the original version -- not the practical version). Quantum cryptography is pretty close, depending on how much trust you place in the laws of physics. Granted, none of these are very useful.
Don't forget Dining Cryptographer's nets and CalShad nets.