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| jdege | Dec 7 2006, 09:58 PM |
Elite member
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Howdy, folks  I'm a new user. Like many of you, I expect, I read John Peterson's "Codes and Secret Messages" as a kid. And it got me hooked. My high school was high tech - we had programming classes, in Dartmouth BASIC, using DEC TTY 10s and 110-baud acoustic coupled modems. For extra credit, I wrote a program that implemented a brand new encryption algorthim of my own invention that was guaranteed unbreakable  In other words, I, too, re-invented a Vigenere. I thought was being terribly clever, using multiple keywords of differing length, but that's just Vernam's two-tape cipher. I took a long keyphrase, broke it down into five subkeys of lengths 5, 7, 11, and 13, and applied each separately, adding to the plaintext mod-26. Just the usual sort of reinventing the wheel that we've all of us done. In any case, I'm messing about with ciphers, again. (I was tasked with changing an old app to that it no longer stored plaintext passwords in the database. Boss said "do something simple, so that it looks like it's encrypted. So I wrote something that combined XOR encryption with 64k passes through a cryptographically secure hash routine. Simple  )In any case, it got me thinking about ciphers, again, and I've been reading up on it in more detail than I had, before. (Finally read Kahn!) I'm playing around with writing crypto software, again. Designing routines for calculating kappa, phi, incidence of coincedence, dreaming about shotgun, annealing, genetic algotithm approaches to breaking the various common encryptions, etc. And browsing the web. Which brought me here... Howdy! |
| When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl. | |
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| Hey! · Community | |
2:09 PM Nov 28
