Newsgroups: sci.crypt Path: cactus.org!ritter From: ritter@cactus.org (Terry Ritter) Subject: Re: Ladder DES Message-ID: <1994Feb25.175256.1510@cactus.org> Organization: Capital Area Central Texas UNIX Society, Austin, Tx References: <1994Feb22.083353.26012@cactus.org> <2kejt8$1384@msuinfo.cl.msu. + edu> Date: Fri, 25 Feb 1994 17:52:56 GMT In <2kejt8$1384@msuinfo.cl.msu.edu> mrr@scss3.cl.msu.edu (Anonymous) writes: >Another, already somewhat widely used alternative is >RSA Data Security's "DESX", as implemented in their commercial >products MailSafe and BSAFE since 1986/87. DESX is ordinary >DES with pre- and post-processing to expand keysize and >security. Like Ladder DES, it is faster than triple-DES. I don't find it in the RSA FAQ. Where was this design published openly for comment? What were the comments? >I have some reason to believe that RSA may be willing to >allow use of DESX free of licensing fees. Perhaps someone >from RSA would comment? What is the patent number? Without a patent, there is no need to ask permission. Terry