In the data authentication system and data authentication method and the data authentication system to which the electronic authentication server proves

摘要

PROBLEM TO BE SOLVED: To provide a data authentication system or the like capable of certificating a fact of transmission / reception of each of data communicated between a service client 20 and a service server 30 in real time and also certificating a cross-reference between a request 50A and a response 53.;SOLUTION: The service client 20 includes a response receipt generating means 22 or the like for generating a response receipt 54. The service server 30 includes a request receipt generating means 31 or the like for generating a request receipt 30. An electronic authentication server 40 includes a request legitimateness confirmation means 42 for confirming and storing the legitimateness of the request 50A, a response legitimateness confirming means 45 for confirming and storing the legitimateness of the response 53, a request receipt legitimateness confirming means 46 for confirming and storing the legitimateness of a request receipt 52, and a response receipt legitimateness confirming means 49 or the like for confirming and storing the legitimateness of the received response receipt 54.;COPYRIGHT: (C)2004,JPO&NCIPI