IPR Details
Simon Josefsson's statement about possible IPR claimed in RFC 4634 belonging to The United States of America as represented by the National Security Agency

Submitted: January 23, 2007

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

Holder legal name
The United States of America as represented by the National Security Agency

'II'. Contact Information for the IETF Participant Whose Personal Belief Triggered this Disclosure

Simon Josefsson
Other info

T: +46-8-6190422

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

RFC4634 ("US Secure Hash Algorithms (SHA and HMAC-SHA)")

'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)

US patent 6,829,355
Date: December 7, 2004
Country: USA

Notes: The relevance of this patent to the RFC is based on the comments in the section
"After the panel" from:


The patent itself is available from:


B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

'V'. Contact Information of Submitter of this Form

Submitter name
Submitter email

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