Secure authenticated channel

Details Secure authenticated channel Secure authenticated channel

2008-10-23

2010-10-05

Zand, Kambiz (Department: 2434)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S155000, C713S156000, C713S168000, C380S028000, C380S044000, C380S030000

Reexamination Certificate

active

07809946

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, Kperm, 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 gx, which is sent to the second peer. The second peer calculates a second ephemeral public key gyin the same manner, and an ephemeral shared key Keph, hashes gy, Keph, Kperm, and its identity, and sends gyand the hash to the first peer. The first peer calculates Keph, verifies the hash, and hashes gx, Keph, Kperm, and its identity, and sends it to the second peer that verifies this hash. Thereafter, both peers obtain a session key by hashing Keph. The apparatuses may then use the session key to establish a secure authenticated channel (SAC).

REFERENCES:
patent: 5737419 (1998-04-01), Ganesan
patent: 5889865 (1999-03-01), Vanstone et al.
patent: 5953420 (1999-09-01), Matyas, Jr. et al.
patent: 2002/0057796 (2002-05-01), Lambert et al.
patent: 2004/0081321 (2004-04-01), Struik

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