Re: DES & IBM's patents

Adam Shostack (adam@homeport.org)
Fri, 24 Jul 1998 08:23:25 -0400 (EDT)

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Rich Salz wrote:
| >Um, no. IBM has not enforced their DES patents for any
| >weird new modes.
|
| Is CDMF ("40bit DES") a wierd mode of DES or something new altogether?
| They do enforce that patent.

        Changing the key scheduling is changing the cipher. Its a DES
derivative, not a mode. (IMHO, anyway.)

Adam

-- 
"It is seldom that liberty of any kind is lost all at once."
					               -Hume

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