| 摘要 |
PROBLEM TO BE SOLVED: To satisfy strong forward security by reducing influence of delay.SOLUTION: A request device 10 calculates a short period public key ekand short period secret key dk, generates a first key Kand a first cipher text CT, and transmits the first cipher text CTand the short period public key ekto a response device 20. The response device 20 generates a third cipher text CT, generates a second cipher text CTand a second key K, and transmits the second cipher text CTand the third cipher text CTto the request device 10. The request device 10 generates a second key K, generates a third key K, and generates a session key SK by using the first key K, second key K, and third key K. The response device 20 generates a first key K, generates a third key K, and generates the session key SK by using the first key K, second key K, and third key K. |
