| 摘要 |
PROBLEM TO BE SOLVED: To use a cryptographic technology where a solution that is created in the same order is to be the same solution used in a transmitter and a receiver between unspecified transmitters and receivers without damaging safety. SOLUTION: A server connected to a network connected to a communication device creates an initial solution used to each create a solution by two communication devices that perform communications each time by receiving a communication demand data from the communication device, and encrypts the initial solution to transmit the same to two communication devices. The two communication devices that receive the same continuously create solutions using the same solution as received by the devices, and performs encrypted communications using an algorism and a key that are created using the same. COPYRIGHT: (C)2009,JPO&INPIT
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