Common use of Freshness Clause in Contracts

Freshness. The freshness notion captures the intuitive fact that a session key is not “obviously” known to the adversary. A device U is said to be Fresh, in the current operation execution, (or holds a Fresh sk) if the following two conditions are satisfied. First, nobody in has ever been asked for a Corrupt-query from the beginning of the game (during the lifetime of the αi’s). Second, in the current operation execution, U has accepted and neither U nor its partners have been asked for a Reveal-query.

Freshness. The freshness notion captures the intuitive fact that a session key is not “obviously” known to the adversary. A device U is said to be Fresh, in the current operation execution, (or holds a Fresh sk) if the following two conditions are satisfied. First, nobody in has ever been asked for a Corrupt-query from the beginning of the game (during the lifetime of the αi’s). Second, in the current operation execution, U has accepted and neither U nor its partners (other parties with the same session key) have been asked for a Reveal-query.

Freshness. The freshness notion captures the intuitive fact that a session key is not “obviously” \obviously" known to the adversary. A device U is said to be Fresh, in the current operation execution, (or holds a Fresh sk) if the following two conditions are satisfiedsatis ed. First, nobody in C has ever been asked for a Corrupt-query from the beginning of the game (during the lifetime of the αi’si's). Second, in the current operation execution, U has accepted and neither U nor its partners have been asked for a Reveal-query.