The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
Oct. 29, 2004
Alain Durand, Rennes, FR;
Jean-pierre Andreaux, Amsterdam, NL;
Thomas Sirvent, Viarmes, FR;
Thomson Licensing, Boulogne Billancourt, FR;
Abstract
A protocol (i.e. method) and corresponding apparatuses for calculating a session key. Two peers with knowledge of a common Diffie-Hellman permanent key, K, and the identity and public key of the other peer. A first peer chooses a first ephemeral private key x and calculates the first corresponding ephemeral public key g, which is sent to the second peer. The second peer calculates a second ephemeral public key gin the same manner, and an ephemeral shared key K, hashes g, K, K, and its identity, and sends gand the hash to the first peer. The first peer calculates K, verifies the hash, and hashes g, K, K, and its identity, and sends it to the second peer that verifies this hash. Thereafter, both peers obtain a session key by hashing K. The apparatuses may then use the session key to establish a secure authenticated channel (SAC).