METHOD FOR GENERATING DYNAMIC GROUP KEY

摘要

PURPOSE: A method for generation a dynamic group key is provided to improve the performance of a system by reducing an amount of a transmission and reception messages generated in a key generating process. CONSTITUTION: A general node except a master node unicasts a public key based on its own secret key to the master node(110). The master node is one of a plurality of nodes and receives a plurality of public keys. The master node broadcasts an encryption value obtained by exponentially operating the secret key with the public key in a group(120). The general node obtain a group key by using a reverse square operation of the secret key from the encryption key(130).