Bidirectional Initial Authentication Sample Clauses

Bidirectional Initial Authentication. In GeneWave, for ▇▇▇▇▇ and ▇▇▇ who want to make key agreement, we assume they have no prior information of each other. Thus they need to do initial authentication to verify the validity of each other. In this step, we use the response interval less than the threshold δ to distinguish legitimate devices and attackers. Meanwhile, we use ACR features from the response signal to identify a speaker-to-microphone channel. For example, ▇▇▇▇▇ transmits acoustic signal to Bob and authenticates Bob by the response interval. Then, ▇▇▇▇▇ also derives ACR features for the acoustic channel from the response signal that Bob reply to ▇▇▇▇▇. Similarly, Bob also authenticates ▇▇▇▇▇ and derives the ACR features from ▇▇▇▇▇’s response signal for the acoustic channel from ▇▇▇▇▇ to ▇▇▇.