Looks like Cisco is now trying to patent security.... http://www.ietf.org/ietf/IPR/cisco-ipr-draft-ietf-tcpm-tcpsecure.txt Title: Cisco's Statement about IPR Claimed in draft-ietf-tcpm-tcpsecure Received: April 26, 2004 From: Robert Barr <rbarr@cisco.com> Cisco is the owner of one or more pending patent applications relating to the subject matter of "Transmission Control Protocol security considerations" <draft-ietf-tcpm-tcpsecure-00.txt>. If technology in this document is included in a standard adopted by IETF and any claims of any Cisco patents are necessary for practicing the standard, any party will be able to obtain a license from Cisco to use any such patent claims under reasonable, non-discriminatory terms, with reciprocity, to implement and fully comply with the standard. For information contact: Robert Barr Worldwide Patent Counsel Cisco Systems 408-525-9706 rbarr@cisco.com