| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processing apparatus capable of ensuring the security of data communication in a state that accurate precision of a present time counted by the information processing apparatus is hard to ensure. SOLUTION: In a printer 10 (server apparatus) and a personal computer 30 (client apparatus) for carrying out encryption communication using a server certificate and a client certificate with validity set to them, the validity of the client certificate or the like is discriminated by taking into account an error related to the present time of a count means provided to the printer 10 or the like. COPYRIGHT: (C)2008,JPO&INPIT |
