| 摘要 |
PROBLEM TO BE SOLVED: To provide an encryption key setting method which has high-level security such that information leaks with very low possibility even when a PC is stolen by any possibility. SOLUTION: The PC 20 generates a public key C1 and a secret key C1. A management server 10, when receiving the open key C1 and a setting request packet from the PC 20, generates its public key S1 and secret key S1. The PC 20 receives the public key S1, and encrypts and sends back its intrinsic information. The management server 10 decodes the encrypted information and generates a security key by using the intrinsic information, time information, etc. The PC 20 decodes the security key by using the public key C1 and transmits the the decoded security key. The PC 20 decodes the received encrypted information by using the secret key C1 and encrypts predetermined data by using the security key. COPYRIGHT: (C)2007,JPO&INPIT
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