Title: Tecsec's Statement about IPR claimed in IETF Technology Received: 1 March 2004 From: John Petty February 27, 2004 IETF Secretariat c/o Corporation for National Research Initiatives 1895 Preston White Drive, Suite 100 Reston, VA 20191-5434 ietf-ipr@ietf.org Dear Sir/Madam: This letter sets forth Tecsec's patent licensing policy regarding any IETF Standard. Tecsec, in accordance with RFC 2026 and its own general licensing policy, is prepared to license its IPR on reasonable, non-exclusive, non-discriminatory terms and conditions. In particular, Tecsec is willing to negotiate nonexclusive, worldwide licenses under its IPR to allow the manufacture, use, sale, offer for sale and importation of the portions of any product that implement and are compliant with all relevant portions of the standard; provided that these licenses may not extend to any part or function of a product that is not required to implement or comply with the standard. In given circumstances, Tecsec's license grant may be conditioned upon the licensee's grant of a reciprocal license under the licensee's IPR and IPR owned by parties with which licensee is affiliated. In assessing reasonable royalty rates, Tecsec may refer to the royalty rates that a potential licensee has set for its own IPR and IPR of parties with which it may be affiliated. Tecsec also reserves the right to grant licenses to its IPR as part of a cross-license with any other party. With respect to XML encryption and signature, we refer you to the following U.S. patents, which are of particular interest: Patent Name Patent Number Issue Date Distributed cryptographic object method 5,369,702 11/29/1994 " 5,680,452 10/21/1997 " 5,717,755 02/10/1998 " 5,898,781 04/27/1999 XML encryption scheme 6,694,433 02/17/2004 Sincerely, /s/ John R. Petty Chairman cc: Russ Housley [housley@vigilsec.com]