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:
Oct. 15, 1996
Filed:
Sep. 22, 1994
Michio Shimada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A pseudorandom number generator which uses linear feedback shift registers and a nonlinear function circuit and can make the conditioned output distribution of generated pseudorandom numbers uniform even if the conditioned output distribution of the nonlinear function circuit has some deviation. The generator has a shift register to which the output of the nonlinear function circuit is inputted as a serial input, an initial value setting circuit for setting random initial values to the linear feedback shift registers and the shift registers, and an adder for adding predetermined bits of the parallel outputs of the register and outputting a pseudorandom number stream. The generator can be used to generate a cryptogram which cannot be deciphered by the correlation attack method.