The following was sent by Stephen Samson to the PKIX Working Group Co-Chairs and the Security AD on March 12, 1998: PATENT DISCLOSURE STATEMENT Source: ENTRUST TECHNOLOGIES LIMITED Title: Patent Disclosure Statement Relating to Proposed IETF Public Key Infrastructure (X.509) Standard (PKIX) Entrust Technologies Limited advises the IETF that it holds the Patent (as defined herein) which may relate to the IETF. In accordance with the Intellectual Property rights procedures of the IETF standards process, Entrust Technologies Limited, for itself and its subsidiaries (hereinafter called "Entrust") will offer licenses under its Patent on a non-exclusive basis and on non-discriminatory, fair and reasonable terms to all parties solely for their use in complying with the Standard, but on condition that any such party offers to Entrust and its corporate affiliates similar licenses under such party's patents, if any, for use in complying with the Standard and related IETF standards. Any application for a license under Entrust's Patent pursuant to this Patent Disclosure Statement should be made to: Stephen Samson Entrust Technologies Limited 8th Floor, 750 Heron Road, Ottawa, Ontario, Canada, K1V 1A7 As used herein: "Patent" means US Patent 5,699,431 issued on 16 December, 1997 for an invention known as a "Method for Efficient Management of Certificate Revocation Lists and Update Information", which invention is owned or controlled by Entrust and the use of which may be required in conjunction with the Standard. "Standard" means a specification progressing through the Standard Track of the IETF and relating to the Public Key Infrastructure (X.509) specifications. ENTRUST TECHNOLOGIES LIMITED By: ___________________ Title: ___________________ Date: ___________________ GRANT OF RIGHTS FOR US PATENT 5,699,431 Purpose This grant is made to help facilitate inclusion of certain patented technology covered under US Patent 5,699,431 (herein called the "Technology") in the Public Key Infrastructure (X.509) Standard (herein called the "Standard"). Entrust Technologies Limited (herein called "Entrust") offers the Technology to the IETF as a method for efficient management of Certificate Revocation Lists and Update Information. It should be noted that the confirmatory license mentioned is optional, since the grant of rights is automatic. Grant of Rights to Entrust Technologies US Patent 5,699,431 Entrust hereby covenants that it will not assert any claims in US Patent 5,699,431 any continuations, divisions, or continuations-in-part of either, or any non-US counterparts of any of the foregoing against any party that makes, uses, or offers a non-commercial implementation of an IETF specification that includes the Technology, or any continuation, division or continuation-in-part of that contribution, provided that contribution is employed to implement the Public Key Infrastructure (X.509) Standard. Such grant of rights is limited in that it does not include rights for commercialization of the Technology, including incorporating such Technology into commercial products. A license for commercial uses of the Technology must be applied for at the address written below. This grant of rights will permanently terminate with respect to any party (and to any affiliate of the party) that asserts a patent it owns or controls, either directly or indirectly, against Entrust or any of its affiliates for implementation of, or operation of any system utilizing the Technology. The termination of rights will occur as of the date the patent is asserted against Entrust. Confirmatory License A written confirmation of this grant, and/or a license under any other patent under Entrust's then-current terms, conditions, and royalty rates, can be obtained by sending a request to: Stephen Samson Entrust Technologies Limited 8th Floor, 750 Heron Road, Ottawa, Ontario, Canada, K1V 1A7