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I assume from this statement that you haven't looked at my code. Send me email and I'll give you a copy... or maybe someone that I gave it to could put it up on an FTP site, so you can get it anonymously.
Hey Matt, I'd be interested in a copy of your code!
Yes, the cipher is of my own design. First off, I can assure you that a brute-force keysearch will not work. The cipher employs three 36 element substitution arrays, which gives a total of 3x36! possible keys, or over 10^42. DES has about 7.2 x 10^16 possible keys and IDEA about 10^38.
Well, you do have to be careful: a large number of keys doesn't mean a cipher is hard to break, there may be a faster method than brute force. For instance, those cryptograms some papers print in the puzzle section are a simple substition cipher, with 26! keys... yet they are also pretty much trivially breakable with enough input. Karl Barrus <klbarrus@owlnet.rice.edu> -----BEGIN PGP SIGNATURE----- Version: 2.3a iQCVAgUBLXD7gIOA7OpLWtYzAQG6wQP/Qcim32WFYHrjZ53bIHJ2CSjmoRSmh5XI Gcm9LbvvwPOywAzEzWaTw0g31c6rz9xor/g8EYX25lyMsYSX36LpyrZRO77XeJI4 sEitU9S8Dp0GWIVgXT6a2reLkUwbIuTU5Y4KFpRvbvTKN33GU+GKFgPAxV6/+FLr d+rC3w2F/ms= =U9gg -----END PGP SIGNATURE-----