IPR Details
VeriSign, Inc.'s Statement about IPR related to draft-kaizer-dnsop-ml-dsa-mtl-dnssec

Update this IPR disclosure
Submitted: July 6, 2026 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 VeriSign, Inc.

II. Patent Holder's Contact for License Application
Holder contact name VeriSign, Inc., Law Department
Holder contact email Licensing@verisign.com
Holder contact info

VeriSign, Inc.
Law Department
12061 Bluemont Way
Reston VA 20190
+1-703-948-3200

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

Name James Gould
Email jgould@verisign.com
Other info

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

Internet-Draft:
draft-kaizer-dnsop-ml-dsa-mtl-dnssec ("Module-Lattice-Based Signatures with Merkle Tree Ladders (ML-DSA-MTL) for DNSSEC")
Revisions:
00

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: US18/137992
Inventor: Burton Kaliski, Andrew Fregly, Joseph Harvey, Swapneel Sheth
Title: METHODS AND SYSTEMS FOR GENERATING CONDENSED SIGNATURES FOR AN EVOLVING DATA SERIES AND APPLICATIONS THEREOF
Date: 2023-04-21

B. Does this disclosure relate to an unpublished pending patent application?: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

Verisign is owner of U.S. Patent Application Nos. 18/137966, 18/137992, 18/219522, 19/260034, and 19/697014 (collectively, the "Patent Applications" or "Intellectual Property") relating to the subject matter of the Internet-Draft entitled "Module-Lattice-Based Signatures with Merkle Tree Ladders (ML-DSA-MTL) for DNSSEC" and any successive versions deriving therefrom (collectively, the "I-D").

In furtherance of IETF standardization, it is Verisign's business practice to make licenses to its Intellectual Property available on fair, reasonable, and nondiscriminatory terms and conditions.

Standards Development Grant.
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Verisign grants to any party a non-sublicenseable, world-wide, non-exclusive, no-charge, irrevocable (except as provided below) license under the Intellectual Property to make, use, and/or import products and/or services that implement the I-D for the sole purpose of facilitating the standardization of the I-D.

Verisign retains the sole and exclusive right to terminate the Standards Development Grant, to the extent permitted by applicable laws, and assert its Intellectual Property against any party that institutes or agrees to institute patent litigation (including cross-claims or counterclaims in a lawsuit), either directly or indirectly, against Verisign or any of its affiliates or products (“Defensive Termination Right”).

The Standards Development Grant will terminate upon the earlier of: (i) expiration of the I-D; (ii) the date the I-D is published in the Request for Comments ("RFC") Series; or (iii) the date Verisign exercises the Defensive Termination Right.

Grant on Standardization.
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In the event the I-D is published as an Experimental, Informational, or Standards Track RFC, as described in RFC 2026 and its successors, ("Specification") such that one or more claims of patents that issue from the Patent Applications would necessarily be infringed due to requirements for practicing the normative portion(s) of the Specification (each an "Essential Claim"), following termination of the Standards Development Grant (as described above) Verisign grants to any party a non-sublicenseable, world-wide, non-exclusive, no-charge, irrevocable (except as provided below) license to each Essential Claim to make, use, sell, offer for sale and import products and/or services that implement the Specification solely for use with DNS Security Extensions (DNSSEC); provided, Verisign retains the sole and exclusive right to:

(i) terminate the above license, to the extent permitted by applicable laws, and assert its Essential Claims against any party that institutes or agrees to institute patent litigation (including cross-claims or counterclaims in a lawsuit), either directly or indirectly, against Verisign or any of its affiliates or products,

(ii) assert its Intellectual Property (including Essential Claims) relating to any products or services that are not fully compliant with the Specification,

(iii) assert its other patents and claims with respect to any products, services, or portions thereof, not required for compliance with the Specification and exclusive of the Essential Claims.

Verisign encourages any party relying on the Grant on Standardization license to cite compliance with the Specification and include the following attribution:
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This product is licensed under patents and/or patent applications owned by VeriSign, Inc., who provides such licenses royalty-free in furtherance of IETF standardization which helps support the security, stability and resiliency of the Domain Name System (DNS) and the internet. For more information about the patents, visit https://www.verisign.com/legal-center/intellectual-property/
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Royalty-bearing licenses may be available upon request.

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 VeriSign, Inc., Law Department
Submitter email Licensing@verisign.com

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