| 摘要 |
PCT No. PCT/GB94/02004 Sec. 371 Date Mar. 13, 1996 Sec. 102(e) Date Mar. 13, 1996 PCT Filed Sep. 14, 1994 PCT Pub. No. WO95/08232 PCT Pub. Date Mar. 23, 1995An encryption/description apparatus enables encrypted communication between two stations each incorporating such an apparatus. The apparatus is arranged when acting as sender to create (at 71) a mutual primitive from stored items of data, to generate a random session key and encrypt the random session key (at 73) in accordance with the mutual primitive for transmission of the encrypted session key to the recipient station. The sender apparatus further encrypts the main message (at 72) in accordance with the random session key for transmission of the encrypted message to the recipient station. The sender apparatus also stores a registration code and transmits this to the recipient station, where it is decoded (at 74) to recreate the mutual primitive from items of data stored at the recipient station. The recipient apparatus decrypts the encrypted session key (at 75), using the recreated mutual primitive, and then decrypts the main message (at 76) using the recreated random session key. |
