| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leak of data by the access from an illegal person in the encrypted communication and generate a session key by the information which can be shared only between the reliable partners. SOLUTION: A processing unit is provided with a communication processing part 1, a input device 2 like a key board and a mouse, a display device 3, a central processing unit 4, a main storage device 5, a second storage device 6 which stores such as a processing module and a table for displaying a color image, a session key generating part 9, a session key information preservation part 10, and a session key switch timing control part 11. At the time of encrypted communication a session key used before is used when a new session key is generated. |
