The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2013
Filed:
Sep. 09, 2005
Applicant:
Mitsuru Matsui, Tokyo, JP;
Inventor:
Mitsuru Matsui, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pseudo-random number generatorgenerates a pseudo-random number by the following operation. At C.2, S[B] is determined from Bset in a second internal memory, and S[B] is determined from B. Then, R[J] is generated from S[I], S[B], and S[B]. At C.3, S[I] is newly generated based on S[B] and S[B]. At C.4, Bis updated from S(I). In the above, the relationship between R[J] and S(I) is cut off, which makes difficult to estimate S(I) from R[J], and security is increased. Further, since S[I], S[B], S[B], etc. have 4 bytes, the processing speed is high.