KEY RECOVERING SYSTEM AND METHOD USING MULTIPLE AGENT

摘要

PURPOSE: A key recovering system and method using multiple agent are provided to increase a time and a security of a key recovery by secretly designating an optional recovering agent from an agent group using a multiple agent. CONSTITUTION: A key recovering system(41) performs a key recovering request when a receiver loses a key for solving a code word. A key recovering center system(42) requests a partial key recovery from a key recovering agent in order to perform a key recovery which the receiver has requested. A key recovery agent system(43) includes a plurality of key recovery agents for performing a partial key recovery requested from the key recovering center system(42). When a transmitter transmits a code word and a key recovery block to the receiver, the receiver receives the code word. When the receiver loses a key which decodes the code word, the receiver requests a key recovery by transmitting the key recovery block to the key recovering center system(42).