| 摘要 |
PROBLEM TO BE SOLVED: To allow a communication node to generate a ciphering key by allowing a 1st seed and a 2nd seed to make communication for a 1st communication session and a 2nd communication session separated tentatively respectively. SOLUTION: A communication circuit is provided with a 1st communication circuit 130 installed in a 1st communication node 110 and a 2nd communication circuit 140 installed in a 2nd communication node 120. Then 1st and 2nd processing circuits 170, 180 generate a ciphering key from 1st and 2nd seeds independently at the 1st and 2nd communication nodes 110, 120. Thus, the communication circuit and the processor circuit unit are partitioned in each of the 1st and 2nd communication nodes 110, 120. Thus, the transmission of the 1st seed and the 2nd seed and the secrecy of the ciphering key in the 1st and 2nd communication nodes 110, 120 are improved for the periods of the 1st communication session and 2nd communication session. |
