[1290] in cryptography@c2.net mail archive
ciphers - patented then 'released'
daemon@ATHENA.MIT.EDU (Rodney Thayer)
Thu Jul 31 10:43:01 1997
Date: Wed, 30 Jul 1997 20:39:41 -0400
To: cryptography@c2.net
From: Rodney Thayer <rodney@sabletech.com>
I gather DES was originally patented (by IBM?). Now some people are
looking at CAST, which is apparently patented but being freely shared by
Entrust. Does anyone know where there are references to the DES patent,
and/or discussion of it's being released for use without a fee?
What I'm looking for is documentation to show CAST is freely usable, and as
a comparison I am wondering what was done to make DES freely usable.
