Title: Certicom's Statement About IPR Claimed in RFC 3526, RFC 2409, 
       draft-ietf-ipsec-ikev2, and Other IETF Specifications Using MODP Groups
Received: 4 February 2004
From: Tony Rosati <TRosati@certicom.com>

Dear Sir or Madam:

We wish to advise the IETF that Certicom believes it has rights
under patents and pending applications that relate to RFC 3526
"More Modular Exponential (MODP) Diffie-Hellman Groups for
Internet Key Exchange (IKE)", RFC 2409 "Internet Key Exchange",
Internet Draft (draft-ietf-ipsec-ikev2-12.txt) "Internet Key
Exchange (IKEv2) Protocol" and other IETF specifications using
MODP Groups (individually and collectively the "IKE
Specifications"). The applicable patents and applications
include, but are not limited to, US Patents #5,933,504,
#6,563,928, #6,078,667, #6,178,507, #6,195,433, US Patent
Application Publications #2001/0014153, #2002/0090085,
#2001/0021256, and any corresponding foreign applications.

Certicom will, upon written request, provide a nonexclusive,
royalty-free patent license, with reasonable terms and
conditions, under those patents issued to Certicom that contain
claims essential to the IKE Specifications and for which
Certicom is able to provide patent licenses, within the limited
field of use of MODP public key cryptography implemented using
the well known Groups 1 and 2 as defined in RFC 2409. This
patent license is available to all entities willing to grant
Certicom a reciprocal license.

Any party wishing to request a patent license should write to:

Tony Rosati
VP of Intellectual Property & Licensing
Certicom Corp.
5520 Explorer Drive, 4th Floor
Mississauga, ON L4W 5L1
Tel:(613) 254-9265

email: trosati@certicom.com