Article View: sci.crypt
Article #1254If CFM/CBC patented?
From: Dane C. Butzer
Date: Fri, 06 Nov 1992 15:32
Date: Fri, 06 Nov 1992 15:32
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Does anybody know if CFM (cipher feedback mode) and/or CBC (cipher block
chaining) are patented techniques? I've read about them in many books and
articles, and I've seen nothing to indicate that they are. However, with
certain people out there seemingly trying to patent Math itself, I didn't want
to assume anything...
Dane Butzer
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<1992Nov6.153201.18739@ee.eng.ohio-state.edu>Path:
arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!sample.eng.ohio-state.edu!columbia!butzerdShow Full Headers
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Newsgroups: sci.crypt Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!sample.eng.ohio-state.edu!columbia!butzerd From: butzerd@columbia.eng.ohio-state.edu (Dane C. Butzer) Subject: If CFM/CBC patented? Message-ID: <1992Nov6.153201.18739@ee.eng.ohio-state.edu> Sender: news@ee.eng.ohio-state.edu Organization: The Ohio State University Dept of Electrical Engineering Date: Fri, 6 Nov 1992 15:32:01 GMT Lines: 15