| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an encryption communication system, an encryption communication method, and a device that are able to restrain deterioration in the safety of encryption communication against deterioration in the reliability of a relay station.SOLUTION: An encryption communication system includes: key sharing means (111, 112, 161, 162) for sharing multiple independent encryption keys (K, K) with communication opposite parties (11, 16) through multiple different physically-independent parallel paths connected with the communication opposite parties; and a multiple encryption unit (113) and a multiple decryption unit (163) for performing multiple encryption on messages (M) to be transmitted to the communication opposite parties by means of the encryption keys shared with the communication opposite parties, and for decrypting multiple-encrypted massages received from the communication opposite parties by means of the encryption keys shared with the communication opposite parties.</p> |
