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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:20:52 ADT
Jim Adler (jadler@soundcode.com)
Fri, 24 Jul 1998 08:31:23 -0700
>Lewis McCarthy writes:
>Suppose the set of possible encryption functions of a cipher
>-- defined by the possible encryption keys -- formed a group.
>For each key, the decryption function is the inverse of the
>encryption function. Every group element must have an inverse
>in the group, so each decryption function must also be a group
>element. The group is closed under the group operation,
>function composition. Then E_3(D_2(E_1())) is a group element,
>equivalent to some E_4() in the cipher.
Since we're talking about group structure, has there been any analysis
on whether Skipjack is a group (or close to a group)?
=========
Jim Adler
Soundcode, Inc.
www.soundcode.com
The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:20:52 ADT