| 摘要 |
<p>[PROBLEMS] When two communication nodes communicate with each other they more reliably confirm that the communication party is a correct one. [MEANS FOR SOLVING PROBLEMS] Computation is performed on the basis of a first communication identifier created by a second communication node and contained in a first authentication message replied to the first communication node in response to a connection request message transmitted from the first to the second communication node, authenticator data held in the first communication node, and a second communication identifier created by the first communication node so as to create a message different from the other messages each time, creatable easily from the authenticator data, identifiable as a message created in response to the first authentication message, and not easy to derive or deduce authenticator data from this message. The second authentication message is checked.</p> |
