| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seed generation circuit generating a seed having high randomness, and allowing integration into a small circuit, and to provide a random number generation circuit, semiconductor integrated circuit, IC card and information terminal device, using it. <P>SOLUTION: This seed generation circuit has: an oscillator circuit 10 continuously or intermittently oscillating; a smoothing circuit 20 controlling appearance frequency of '0' and '1' in a digital data string outputted from the oscillator circuit and outputting the digital data string as time series data; and a genuineness circuit 30 generating a seed of one bit by an arithmetic process using a plurality of bits among the time series data. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
