Secure authenticated channel

Details Secure authenticated channel Secure authenticated channel

H - Electricity

04

L

H04L 9/30 (2006.01) H04L 9/32 (2006.01)

Patent

CA 2486267

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 perm, 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 x, which is sent to the second peer. The second peer calculates a second ephemeral public key g y in the same manner, and an ephemeral shared key K eph, hashes g y, K eph, K perm, and its identity, and sends g y and the hash to the first peer. The first peer calculates K eph, verifies the hash, and hashes g x, K eph, K perm, and its identity, and sends it to the second peer that verifies this hash. Thereafter, both peers obtain a session key by hashing K eph. The apparatuses may then use the session key to establish a secure authenticated channel (SAC).

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