PSEUDO RANDOM NUMBER GENERATION DEVICE - MITSUBISHI ELECTRIC CORP

Title:

PSEUDO RANDOM NUMBER GENERATION DEVICE

Document Type and Number:

WIPO Patent Application WO/2007/029330

Kind Code:

A1

Abstract:

A pseudo random number generation device (100) generates a pseudo random number as follows. In C.2, S1[B41] is decided from B41 set in a second internal memory, and S2[B40] is decided from B40. R[J] is generated from S1[I], S1[B41], and S2[B40]. In C.3, S1[I] is newly generated according to S1[B41] and S2[B40]. In C.4, B4 is updated from S2(I). In the aforementioned process, the association of R[J] with S2(I) is cut off and it is difficult to estimate S2(I) from R[J], which increases the safety. Moreover, the S1[I], S1[B41], S2[B40], and the like are four-byte codes and processing speed can be increased.

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Inventors:

MATSUI MITSURU (JP)

Application Number:

PCT/JP2005/016586

Publication Date:

March 15, 2007

Filing Date:

September 09, 2005

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
MATSUI MITSURU (JP)

International Classes:

G09C1/00; G06F7/58; H04L9/22

Foreign References:

JP2002506243A	2002-02-26
JPH07199808A	1995-08-04
JPH09509748A	1997-09-30

Attorney, Agent or Firm:

MIZOI, Shoji et al. (Ofuna Building 3rd floor 17-10, Ofuna 2-chom, Kamakura-shi Kanagawa 56, JP)

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