RE: Patents and Trademarks for IEEE P1363 Working Group
Your letter of March 18, 1998
This letter supersedes my letter of November 9, 1997. The following patents have been issued to me:
These patents are equivalent except that the European and the Japanese Patent have a broader claim coverage than the U.S. registration.
From studied review it is evident that the Nyberg-Rueppel signature generation and verification (DLSP-NR and DLVP-NR) and the NIST Digital Signature Algorithm (DLSP-DSA and DLVP-DSA) involve the discrete log signatures using subgroups of the integers modulo a prime p that are of a prime order q as well as discrete log signatures using elliptic curves.
The above mentioned patents apply to various implementations of discrete log signatures of that sorts and hence covers the use of Nyberg-Rueppel and DSA signatures in these instances.
I have licensed RSA Data Security, Inc. as the exclusive -- except for Siemens AG -- licensing authority of my patents. Siemens AG has a non-exclusive license of my patents including the right of sublicensing.
Licenses are available on a reasonable and non-discriminatory basis. License terms may be obtained by contacting either the Manager of Intellectual Property, James Ting at RSA or Mr. Wehr at Siemens AG:
100 Marine Parkway
FAX 650 595 5198
phone 650 595 8782
FAX +89 722 25211
phone +89 722 62793
PS.:Enclosed is a study on the coverage of the DSA by EP-Patent 0384475.