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| Donald | Aug 29 2008, 04:00 AM |
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Elite member
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And THAT is one reason cryptographers insist on enforcing Kerckhoff's Principle. The METHOD of encryption should never be secret. ESPECIALLY when you are trying to analyze a cipher. The attackers should approach the METHOD first, the crypt text second. Don't feel too bad though, it's a mistake we have ALL made. Not just ignoring Kerckhoff's Principle, but designing irreversable ciphers. I designed a REALLY cool cipher once based on a very clever (I thought) system that used a single playfair square to encrypt trigrams. I've forgotten the exact details, but I haven't forgotten the result. I had been playing with my genius discovery for quite some time before I realized that the process was irreversible without the original plain text. Oops! Might make an interesting hash, but was certainly of no use as a cipher. 
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| A New Challenge · Challenges | |
8:28 AM Nov 26
