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

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

This IPR disclosure updates IPR disclosure ID #818, "Philip R. Zimmermann's statement about IPR claimed in draft-zimmermann-avt-zrtp-03.txt".

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".

Update this IPR disclosure. 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.

Submitted Date: February 27, 2010

'I'. Patent Holder/Applicant ("Patent Holder")
Legal Name: Philip R. Zimmermann
'II'. Patent Holder's Contact for License Application
Name:Philip R. Zimmermann
Other Info:

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

'III'. Contact Information for the IETF Participant Whose Personal Belief Triggered this Disclosure:
Name:Philip R. Zimmermann
Other Info:

T: +1-831-425-7524

'IV'. IETF Document or Other Contribution to Which this IPR Disclosure Relates:
Internet-Draft: "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 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):

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B. Does this disclosure relate to an unpublished pending patent application?: yes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

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
Name:Philip R. Zimmermann
'VIII'. Other Notes:

For further information, see