| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate random numbers difficult to predict and prevent reduction in safety by external influence. <P>SOLUTION: This circuit comprises a pseudo random number generation circuit generating M-series of pseudo random numbers, a physical random number generation circuit generating physical random numbers, and a modulation circuit modulating the physical random numbers generated by the physical random number generation circuit by use of the pseudo random number generated by the pseudo random number generation circuit. The pseudo random number generation circuit can generate a plurality of M-series of pseudo random numbers, and switches the M-series to be generated by the pseudo random number generation circuit based on the physical random numbers generated by the physical random number generation circuit. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
