| 摘要 |
<p>PCT No. PCT/EP92/02449 Sec. 371 Date Jul. 8, 1994 Sec. 102(e) Date Jul. 8, 1994 PCT Filed Oct. 27, 1992 PCT Pub. No. WO93/09620 PCT Pub. Date May 13, 1993.An access control system involves a first cryptographic device communicating with a second cryptographic device using a modulo-based protocol. To transmit a message from the first device to the second device, a random number is combined with the number representing the message without using a modulo operation. As a result, the message is hidden. By performing a modulo operation in the second device on the received hidden message, the original message can be recovered. Modular operations by the first device can be avoided reducing the number of modular operations.</p> |
