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→Key derivation
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== Key derivation == | == Key derivation == | ||
The encryption key T(1) and the HMAC key T(2) will be derived from the strong J-PAKE secret K as follows: | |||
key_string = HMAC-SHA256(K, "Sync-AES_256_CBC-HMAC256") | |||
T(1) = HMAC-SHA256(key_string, "" + "Sync-AES_256_CBC-HMAC256" + 0x01) | |||
T(2) = HMAC-SHA256(key_string, T(1) + Sync-AES_256_CBC-HMAC256" + 0x02) | |||
== Data format == | == Data format == | ||