| 摘要 |
PURPOSE: An anonymous authentication method of a mobile satellite communication system is provided to maintain high security by eliminating a verification table storing sensitive information corresponding to an attack target. CONSTITUTION: A first identifier is inputted(S301) by using a storage unit(150). A first session key and a first message authentication code are calculated(S302,S303). An LEO(Low Earth Orbit)(200) adds its own identifier to an authentication message(S305) An NCC(Network Control Center)(400) verifies validity of the LEO(S306). A second identifier corresponding to the first identifier of a user terminal(100) is generated(S308). A second master key and a second session key are generated(S309,S310). A second message authentication code and a received first message authentication code are verified(S312). A new temporary identifier, a second temporary identifier, is generated(S313). A third message authentication code and a fourth message authentication code are verified(S320).
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