Need help to crack two RC2-40 messages 1/2

alex (alex@nospam.com)
Wed, 18 Nov 1998 14:14:39 +0100

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attachement

I'm sorry to post this as an attachment, but I'm doing it this way so the post will not be archived.

Near the end of August, a lot of posts were sent to sci.crypt and other newsgroups by Harris/Idaho.

By the beginning of November, Harris/Idaho have changed their identities to Fox/Scully and are posting only in alt.lang.euphoria and fr.test.

The main algorithm used is unknown but could be an autokey cipher.

The ciphertext is superencrypted sometimes by the Envoi program, a unkeyed program, a lot of times by the Enigma algorithm.

Some of the Enigma messages have been broken -- they use the 3-rotorWehrmacht version.

However, after stripping the superencryption, at least two of these messages are S/MIME messages encrypted with RC2-40/CBC.

Inside these two messages may be plaintext; or it may be yet another layerof encryption.

Thus I need two things:

- A coordinator to coordinate the breaking effort
- A lot of people to donate their CPU time using Bruce Schneier's RC2 breaker program ( http://www.counterpane.com )

Perhaps then we will finally find out what this Idaho/Harris stuff really is!

Alexander PUKALL
alexandermail@hotmail.com

November 18, 1998

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