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Re: Ximp

by Zaxo (Archbishop)
on Dec 02, 2001 at 12:55 UTC ( #128975=note: print w/replies, xml ) Need Help??


in reply to Ximp

This is fun but not too serious crypo. Your wheels have period 16. Give wheel0 9 elements instead of 8 and the period goes to 144=9*16. If the keyword is relatively prime in length, multiply by that length to get the new period. With a long enough plaintext, it's pretty easy to deduce the repetition length and language. From that follows character frequency analysis.

It's also a concern that addition of random elements in a fixed range _reduces_ randomness.

After Compline,
Zaxo

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