History for IPR disclosure
CoreStreet, Ltd. Statement about IPR claimed in IETF's draft Simple Certificate Validation Protocol - draft-ietf-pkix-scvp-18 (

From: http://www.ietf.org/ietf-ftp/IPR/corestreet-ipr-ietf-pkix-scvp-18.txt

Title: CoreStreet, Ltd. Statement about IPR claimed in IETF's draft Simple Certificate Validation Protocol - ietf-pkix-scvp-18 ("SCVP").
Date: June 16, 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). This
disclosure supersedes the prior CoreStreet disclosure dated March 23, 2005.

CoreStreet understands the 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, the
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 the IETF,
and any claim in any of the Patents is necessary for implementing such
standard, CoreStreet will negotiate royalty-bearing 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, including a royalty-bearing license for any
claim(s) of the Patents that would otherwise be infringed by an SCVP server
to determine certificate revocation for Delegated Path Validation (DPV),
provided that the royalty-bearing license is restricted to such use. In
addition, CoreStreet will grant a royalty-free license for any claim(s) of
the Patents that would otherwise be infringed by any product that implements
an SCVP client, provided that the royalty-free license is restricted to such
use. CoreStreet's obligation to grant any such license(s) is conditioned
upon the prospective licensee paying reasonable royalties for the
royalty-bearing license(s) and, in any case, 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