IPR Details
Philip R. Zimmermann's Statement about IPR related to draft-zimmermann-avt-zrtp-17

Submitted: February 27, 2010 under the rules in RFC 3979 as updated by RFC 4879

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.

Updated by

This IPR disclosure has been updated by IPR disclosure ID #1484, "Philip R. Zimmermann's Statement about IPR related to draft-zimmermann-avt-zrtp-22".



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

Holder legal name
Philip R. Zimmermann

II. Patent Holder's Contact for License Application

Holder contact name
Philip R. Zimmermann
Holder contact email
Holder contact info

Santa Cruz, CA 95060 USA
T: +1-831-425-7524

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

Philip R. Zimmermann
Other info

T: +1-831-425-7524

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

draft-zimmermann-avt-zrtp ("ZRTP: Media Path Key Agreement for Unicast Secure RTP")
Revisions: 17

V. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by RFC 3979 as updated by RFC 4879

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

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

Serial number 11/460,621
Date: Applied for July 27, 2006
Country: USA

Notes: Provisional patent application filed in July 2005

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

VI. 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

In relation to an IETF standard based on the ZRTP Specification ("ZRTP Technology"), Philip Zimmermann (together with his successors and assignees, "PRZ") will grant a royalty-free, non-exclusive license with reciprocity to Qualified Parties to use the ZRTP Technology solely to the extent necessary to implement and practice such IETF standards that are in compliance with the ZRTP Specification. As used herein, Qualified Parties means a party who has not, does not and will not assert, in litigation or otherwise, including in licensing discussions, any patent or other intellectual property right against PRZ of any nature, or assert the same against any licensee of the libZRTP SDK because that licensee implements or practices the ZRTP Specification. Any license to a Qualified Party shall terminate at once if such party: (a) no longer meets the definition of a Qualified Party as set forth above; or (b) if applicable, fails to properly implement the disclosure flag described in the ZRTP Specification in a truthful manner. PRZ will grant non-exclusive licenses to Non-Qualified Parties on reasonable and reciprocal terms and conditions. For further information, see http://philzimmermann.com/zfone

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.

VII. Contact Information of Submitter of this Form

Submitter name
Philip R. Zimmermann
Submitter email

VIII. Other Notes

Additional notes

For further information, see http://philzimmermann.com/zfone

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