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IPR Details
Jim Fenton's Statement about IPR related to draft-ietf-dcrup-dkim-crypto belonging to Cisco Technology Inc.

Submitted: June 30, 2017 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.


Updated by

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

Holder legal name Cisco Technology Inc.

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

Name Jim Fenton
Other info

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

draft-ietf-dcrup-dkim-crypto ("A New Cryptographic Signature Method for DomainKeys Identified Mail (DKIM)")

IV. 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)

US Patent 7,437,558B2, "Method and system for verifying identification of an electronic mail message," contains claims relating to the use of key fingerprints obtained from a "key registration server" to verify the validity of a cryptographic signature whose public key is included in an email message. It is possible that the publication of DKIM key fingerprints in DNS records that is proposed in this draft is covered by this patent.

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending No

V. Contact Information of Submitter of this Form

Submitter name Jim Fenton
Submitter email

VI. Other Notes

Additional notes

I am a co-inventor on this patent, but am no longer affiliated with the patent assignee.

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