| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for efficiently securing security of a communication system.SOLUTION: In a verification part 151 of a security processor of a terminal device, a digest holder 151c holds a digest of a public key certificate contained in a packet signal notified from a base station device. A certificate verification part 151a verifies the public key certificate contained in the packet signal. At that time, when receiving a packet signal containing a public key certificate digest different from the public key certificate digest held by the digest holder 151c, the certificate verification part 151a executes verification of the public key certificate contained in the packet signal. When receiving a packet signal containing a public key certificate digest corresponding to the public key certificate digest held by the digest holder 151c, the certificate verification part 151a skips the verification of the public key certificate contained in the packet signal.SELECTED DRAWING: Figure 11 |
