发明名称 |
PRIME CALCULATION DEVICE, METHOD, AND KEY ISSUING SYSTEM |
摘要 |
<p>The present invention offers a prime calculating apparatus for achieving prime calculation where producing identical primes is avoided by simple management techniques. The prime calculating apparatus stores a known prime q and management information unique in the use range of primes. The prime calculating apparatus reads the management information; generates random information R based on the read management information; reads prime q; calculates prime candidate N, according to N = 2 × random information R × prime q + 1, using the read prime q and generated random information R; tests whether the calculated prime candidate N is a prime; and outputs the calculated prime candidate N as a prime when the primality of the calculated prime candidate N is determined. Herewith, the prime calculating apparatus is able to calculate prime candidates from unique management information while avoiding producing identical primes.</p> |
申请公布号 |
EP1699160(A1) |
申请公布日期 |
2006.09.06 |
申请号 |
EP20040807465 |
申请日期 |
2004.12.21 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIES CO., LTD. |
发明人 |
FUTA, YUICHI.;OHMORI, MOTOJI. |
分类号 |
H04L9/08;G06F7/72;G06F17/10;G09C1/00;H04L9/30 |
主分类号 |
H04L9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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