| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase irregularity of one-bit seeds outputted from a random number generating circuit. <P>SOLUTION: The random number generating circuit 50 is provided with an oscillation circuit 11, a smoothing circuit 12 and a genuinizing circuit 13. The oscillation circuit 11 and smoothing circuit 12 are connected by a signal line DL1. A signal line DL11 transmitting a clock signal CLKA is arranged nearby the signal line DL1 on the side of the oscillation circuit 11 of the signal line DL1 only for a period L of predetermined length. The clock signal CLKA transmitted through the nearby-arranged signal line DL11 adds crosstalk noise to an output signal S1 of the oscillation circuit which is transmitted through the signal line DL1, an output signal S1A as random number data which has extremely high randomness viewed in time series is inputted to the smoothing circuit 12, and an output signal S2 smoothed by the smoothing circuit 12 is inputted to the genuinizing circuit 13. <P>COPYRIGHT: (C)2009,JPO&INPIT |
