Title:
乱数生成装置
Document Type and Number:
Japanese Patent JP4288057
Kind Code:
B2
Abstract:
A random number generator comprising a plurality of pseudo random number generating units that can respectively output random numbers in specified pseudo random number systems, an output random number generating unit that generates output random numbers based on outputs from a plurality of pseudo random number generating units, a physical random number generator that generates physical random numbers, and a switching unit for switching between the necessity and the non-necessity of updating output values from pseudo random number generating units based on physical random numbers generated by the physical random number generator. Based on which pseudo random number system an output random number is generated is randomly switched based on a physical random number, making it very difficult to predict a random number compared with a conventional one.
Inventors:
Onya Masato
Haruki Tamaki
Akira Iketani
Haruki Tamaki
Akira Iketani
Application Number:
JP2002331884A
Publication Date:
July 01, 2009
Filing Date:
November 15, 2002
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
Mathematical Design Laboratory Co., Ltd.
Sanyo Semicon Device Co., Ltd.
Mathematical Design Laboratory Co., Ltd.
Sanyo Semicon Device Co., Ltd.
International Classes:
G06F7/58; G09C1/00; H03K3/84
Domestic Patent References:
| JP2001344094A | ||||
| JP56156134U | ||||
| JP63294115A | ||||
| JP61246787A | ||||
| JP62144243A |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida
Previous Patent: JP4288056
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