METHOD FOR KEY RECOVERY USING SRTCP CHANNEL IN VOIP SYSTEM AND APPARATUS THEREROF

摘要

PURPOSE: A key restoration method using a session real-time transport control protocol (SRTCP) channel in a voice over internet protocol (VoIP) system and a device using the same are provided to reinforce independency for listening in each session. CONSTITUTION: A key consignment device comprises a message analysis unit (210), a token generation unit (220), a message generation unit (230), and a transceiver (240). The message analysis unit analyzes a session request message received from a portable terminal and a session response message received from the portable terminal. The token generation unit generates a token corresponding to the session when a session request message is received. The message generation unit inserts the received session response message into the token by receiving the session response message from the portable terminal. The transceiver receives the session request message from the portable terminal and transmits a user identification (ID) and the token generated by the token generation unit to the key management server. [Reference numerals] (210) Message analysis unit; (220) Token generation unit; (230) Message generation unit; (240) Transceiver