IPR Details
RSA's statement pertaining to draft-ietf-ipsec-properties

The text of the original IPR disclosure is available in the disclosure history.

Submitted: August 3, 2001

Note: Updates to IPR disclosures must only be made by authorized representatives of the original submitters. Updates will automatically be forwarded to the current Patent Holder's Contact and to the Submitter of the original IPR disclosure.

'I'. Patent Holder/Applicant ("Patent Holder")

Holder legal name
RSA Security Inc.

'II'. Patent Holder's Contact for License Application

Holder contact name
Linn, John
Holder contact email
Holder contact info

Attn: General Counsel
RSA Security Inc.
36 Crosby Drive, Bedford, MA 01730, USA

'III'. IETF Document or Other Contribution to Which this IPR Disclosure Relates

draft-ietf-ipsec-properties ("Security Properties of the IPsec Protocol Suite")

'IV'. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by Section 6 of RFC 3979

A. For granted patents or published pending patent applications, please provide the following information:

Patent, Serial, Publication, Registration, or Application/File number(s)

Notes: RSA Security Inc. has submitted a patent application concerning client
puzzles, a technique initially described in Juels and Brainard, "Client
Puzzles: A Cryptographic Countermeasure against Connection Depletion
Attacks", ISOC NDSS, 1999. Discussions within the IPsec WG have cited this
technique and have considered incorporation of methods with similar
properties, and the client puzzles concept has recently been referenced in

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

'V'. Licensing Declaration

The Patent Holder states that its position with respect to licensing any patent claims contained in the patent(s) or patent application(s) disclosed above that would necessarily be infringed by implementation of the technology required by the relevant IETF specification ("Necessary Patent Claims"), for the purpose of implementing such specification, is as follows(select one licensing declaration option only):

See Text Below for Licensing Declaration
Licensing information, comments, notes, or URL for further information

If use of client puzzles is
incorporated into a future IPsec specification, and if the currently active
application leads to an issued patent, RSA Security Inc. is willing to grant
licenses to such patent under reasonable and non-discriminatory terms for
purposes of implementing that IPsec specification.

Note: The individual submitting this template represents and warrants that he or she is authorized by the Patent Holder to agree to the above-selected licensing declaration.

'VI'. Contact Information of Submitter of this Form

Submitter name
Submitter email

Only those sections of the relevant entry form where the submitter provided information are displayed.