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IPR Details
Google LLC's Statement about IPR related to draft-chuang-replay-resistant-arc

Submitted: February 16, 2023 under the rules in RFC 8179.

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 Google LLC

II. Patent Holder's Contact for License Application

Holder contact name Eric Zaiser
Holder contact email
Holder contact info

1600 Amphitheatre Pkwy
Mountain View CA 94043

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

Name Wei Chuang
Other info

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

draft-chuang-replay-resistant-arc ("Replay Resistant Authenticated Receiver Chain")
No revisions for this Internet-Draft were specified in this disclosure. The Internet-Draft's revision was 05 at the time this disclosure was posted. Contact the discloser or patent holder if there are questions about which revisions this disclosure pertains to.

V. Disclosure of Patent Information
i.e., patents or patent applications required to be disclosed by RFC 8179

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

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

Number: US17/657678, US63/378145,
Inventor: Wei Chuang
Title: Enhancing Domain Keys Identified Mail (DKIM) Signatures, Protecting Against DKIM Replay
Date: 2022-04-01
Notes: Pending US Patent Application 17/657,678, filed April 1, 2022, titled “Enhancing Domain Keys Identified Mail (DKIM) Signatures” and naming Wei Chuang as inventor;

Provisional US Patent Application 63/378,145, filed October 3, 2022, titled “Protecting Against DKIM Replay” and naming Wei Chuang as inventor.

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending 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):

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

Specification" means the IETF document “Replay Resistant Authenticated Receiver Chain” as posted at

Royalty-Free, Reasonable and Non-Discriminatory License to All Implementers

“Google hereby grants to you a perpetual, worldwide, non-exclusive, no-charge, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, transfer, and otherwise run, modify and propagate implementations of the Specification, where such license applies only to those patent claims contained in the patents disclosed above that would necessarily be infringed because of what is specifically required by the normative portions of the Specification.

This license is offered on the condition that you grant a reciprocal license under terms at least as permissive as this license to all parties for implementations of the Specification under those patent claims, both currently owned by you and acquired in the future, and licensable by you, that must necessarily be infringed because of what is specifically required by the normative portions of the Specification. If you or your agent or exclusive licensee institute or order or agree to the institution of patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that any implementation of the Specification constitutes direct or contributory patent infringement, or inducement of patent infringement, then any patent rights granted to you under this license shall terminate as of the date such litigation is filed.

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 Eric Zaiser
Submitter email

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