| 摘要 |
To provide a method of generating internal crypto-keys to be set initially in a feedback-shift-registers of a pseudo-random-sequence generator of a stream cipher system with sufficient security and sufficiently high speed as well, the method comprises: a step of outputting m sets of first conversion results, obtaining i-th set of the first conversion results by processing (i - 1)-th set of the first conversion results with a first one-way-function; a step of outputting m sets of second conversion results; obtaining i-th set of the second conversion results by processing (i - 1)-th sets of the second conversion results with a second one-way function; and a step of outputting j-th internal crypto-key by XORing j-th set of the first conversion results and (m - j + 1)-th set of the second conversion results. <IMAGE> |
