From: shirey (11/5/92) To: Fred Chase From IEGATE Crypto Patent Dates Received: from mbunix.mitre.org by iegate.mitre.org (SMTP\QM 1.1.3) id AA2803804692; Thu, 5 Nov 1992 10:38:12 GMT Received: from mwunix.mitre.org by mbunix.mitre.org (911016.SGI/4.7) id AA14693; Thu, 5 Nov 92 09:13:58 -0500 Return-Path: Received: by mwunix.mitre.org (5.61/SMI-2.2) id AA15187; Thu, 5 Nov 92 09:13:57 -0500 From: shirey@mitre.org Received: from smiley.mitre.org by mwunix.mitre.org (5.61/SMI-2.2) id AA15047; Thu, 5 Nov 92 09:13:13 -0500 Organization: The MITRE Corp. Received: from [128.29.140.100] (shirey-mac.mitre.org) by smiley.mitre.org.sit (4.1/SMI-4.1) id AA16696; Thu, 5 Nov 92 09:13:10 EST Message-Id: <9211051413.AA16696@smiley.mitre.org.sit> Date: Thu, 5 Nov 1992 09:13:39 -0500 To: psrg@isi.edu, infosec@mitre.org Sender: shirey@smiley.mitre.org (Unverified) Subject: Crypto Patent Dates X-Mdf: fnc re-routed to "fnc@mbunix.mitre.org" Maybe you all know this stuff, but just in case. -Rob- --------------------------------------------------------------- The RSA patent, #4,405,829, was awarded on 9/20/83. It expires on 9/20/00. [17 years] Diffie-Hellman, patent #4,200,770 was awarded on 3/29/80. Merkle-Hellman knapsacks, patent #4,218,582, was awarded on 8/19/80. Pohig-Hellman, patent #4,424,414, was awarded on 3/3/84. ======================================================================