Title: CoreStreet, Ltd.'s statement about IPR claimed in draft-ietf-pkix-scvp-18 Received: 24 March 2005 From: Dave Engberg Title: CoreStreet, Ltd. Statement about IPR claimed in IETF's draft Simple Certificate Validation Protocol - draft-ietf-pkix-scvp-18 ("SCVP"). Date: March 23, 2005 From: David Engberg, Chief Technology Officer This letter describes CoreStreet's position with respect to the current IETF IPR Policy, and provides a disclosure concerning CoreStreet patents that relate to the subject matter of the current SCVP draft (http://www.ietf.org/internet-drafts/draft-ietf-pkix-scvp-18.txt). CoreStreet understands the IETF's IPR Policy to require disclosures of intellectual property rights that are necessarily infringed by implementation of a standard with respect to which a person is contributing; in our case, SCVP. CoreStreet believes an implementation of the SCVP standard (as currently drafted) need not necessarily infringe our patents and, for this and other reasons, believes no disclosure of our patents has been or is required. However, in order to address the concerns raised by the IETF PKIX Working Group, CoreStreet wishes to advise the IETF that it owns the following issued patents that may relate to the subject matter of the SCVP draft (ietf-pkix-scvp-18): U.S. Patent No. 5,717,758: Witness-Based Certificate Revocation System; U.S. Patent No. 5,717,757: Certificate Issue Lists; and U.S. Patent No. 5,666,416: Certificate Revocation System (collectively, the "Patents"). If the SCVP draft (ietf-pkix-scvp-18) is adopted as a standard by IETF, and any claim in any of the Patents is necessary for implementing such standard, CoreStreet will negotiate licenses of the Patents on reasonable and nondiscriminatory terms and conditions for at least any part or function of a product or service that is technically necessary for compliance with such standard. CoreStreet's willingness to grant such license(s) is conditioned upon the prospective licensee paying reasonable royalties and granting a reciprocal license to CoreStreet (and its successors) of its applicable patent rights. Except as provided above, CoreStreet reserves its rights in its intellectual property. For information contact: David Engberg, Chief Technology Officer CoreStreet, Ltd. Email: dengberg@corestreet.com