| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that, when there is system down in a computer within a communication route, communication is not continued forward at all, or that a system or traffic becomes heavy if multiplex encryption is used, of onion routing used as a steganographic communication method. SOLUTION: The present invention relates to a communication method with which a client of an information providing source uses public keys of an information server to which the client himself is connected, a function server of a desired destination of transmission and an information server to which the function server is connected, to perform random number encryption and hash value calculation, and each of servers uses its own private key for decryption and performs comparison with a hash value, thereby judging whether a route is related to each of the servers itself or not. Thus, not only information can be provided while making secret the information providing source or the information providing destination but also a response to provided contents can also be made from the function server of the information providing destination while maintaining anonymity. COPYRIGHT: (C)2008,JPO&INPIT
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