IPR Details
KDDI Corporation's Statement about IPR related to draft-kiyomoto-kcipher2-04

Submitted: June 20, 2011 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 #1916, "KDDI Corporation's Statement about IPR related to draft-kiyomoto-kcipher2-06".

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

Holder legal name
KDDI Corporation

II. Patent Holder's Contact for License Application

Holder contact name
Kazuyasu Yamashita
Holder contact email
Holder contact info

General Manager
Intellectual Property Department, Technology Development Division, Technology Sector
3-10-10, Iidabashi, Chiyoda-ku, Tokyo, Japan
T: +81-120-925-041
F: +81-3-6678-0219

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

Shinsaku Kiyomoto
Other info

Senior Research Engineer
Information Security Laboratory, KDDI R&D Laboratories Inc.
2-1-15 Ohara, Fujimino-shi, Saitama, 356-8502 Japan
T: +81-49-278-7885
F: +81-49-278-7510

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

draft-kiyomoto-kcipher2 ("A Description of the KCipher-2 Encryption Algorithm")
Revisions: 04

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)

- Application Number; JP2007-509142 (PCT/JP2005/021302)?US11/880260 (PCT/JP2005/021302)?US13/068,253(PCT/JP2005/021302)

- Publication Number for PCT/JP2005/021302; WO2006/100801
Date: Date applied: November 18, 2005 for JP / Date applied: July 20, 2007 (November 18, 2005) for US / May 6, 2011 (November 18, 2005) for US
Country: United States (US), Japan (JP)

B. Does this disclosure relate to an unpublished pending patent application?: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

No License Required for Implementers
Licensing information, comments, notes, or URL for further information

KDDI Corporation will retain the right to terminate the license and assert its patents (including the right to claim past royalties) against any licensee that asserts or whose affiliate asserts any patent (either directly or indirectly) against KDDI Corporation or any of KDDI Corporation’s affiliates or successors in title.

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
Shinsaku Kiyomoto
Submitter email

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