Common Contracts
1 similar Continuous Group Key Agreement contracts
Continuous Group Key Agreement with Flexible Authorization and Its ApplicationsContinuous Group Key Agreement • December 20th, 2022
Let the advantage be Advcma( ) that an adversary wins the existentially unforgeable game against chosen message attack (EUF-CMA). Briefly, an ad- versary is allowed to access the signing oracle for any massage as in the usual EUF-CMA definition. In addition, the adversary calls the update oracle that updates the current key (precisely outputs an update message), and calls the corrupt oracle that returns the current signing key. The adversary outputting a pair of message and signature wins if they are valid under the current verification key, the signature is not an output of the signing oracle with the message, and the adversary has at least once used an update message returned by the update
