| 摘要 |
PROBLEM TO BE SOLVED: To provide a communications system capable of easily maintaining a state to be successfully authenticated, while maintaining the security. SOLUTION: When a lower level apparatus 20 is requested by a higher level apparatus 10 to conduct communication, the lower level apparatus 20 provides digital certificates at a plurality of URLs as certificates for receiving authentication from the higher level apparatus 10, that is, the lower level apparatus 20 provides a regular public key certificate which is a digital certificate issued by a public certificate authority, when communication is requested to a regular processing URL, and provides a rescue public key certificate being a digital certificate issued by a private certificate authority, when communication is requested to a rescue URL. Then when communication is conducted with the rescue URL, wherein the rescue public key certificate is provided, processings related to requirements, other than the requirements related to setting the regular public key certificate, are inhibited. COPYRIGHT: (C)2005,JPO&NCIPI
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