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I'm looking for ciphertext analysis tools --

What analysis tools did you use? Where can I get a publicly available copy?

I just wrote a little c program for frequency analysis, but would also be interested if such set of tools existed.

- Igor.

The DIEHARD battery of tools, as seen on the Marsaglia random number cd published by Dr. Marsaglia of Florida university, a notable figure in PRNG design and analysis sounds appropriate for your purposes. It performs a number of statistical tests which may be useful, though I personally happen not to trust statistical tests to a great extent under most circumstances. If you cannot find these tools after a web search for DIEHARD or Marsaglia email me and I will send you a copy... Datacomms Technologies web authoring and data security Paul Bradley, Paul@fatmans.demon.co.uk Paul@crypto.uk.eu.org, Paul@cryptography.uk.eu.org Http://www.cryptography.home.ml.org/ Email for PGP public key, ID: 5BBFAEB1 "Don`t forget to mount a scratch monkey"