Title:
RANDOM NUMBER GENERATION CIRCUIT
Document Type and Number:
Japanese Patent JP2023143167
Kind Code:
A
Abstract:
To stably generate a random number having high entropy.SOLUTION: A random number generation circuit comprises: a sampling circuit which takes in oscillation output of a ring oscillator by using a first clock to generate a random number value; a periodicity detection circuit which detects a periodicity of the sampling circuit output; a randomness test circuit which performs a randomness test of the sampling circuit output; and a control circuit which changes an oscillation cycle of the oscillation output on the basis of a detection result of the periodicity detection circuit, divides the random number output into a plurality of division random numbers to perform random number generation for each division random number, and executes the randomness test for each generation of the division random number.SELECTED DRAWING: Figure 1
Inventors:
NAKANO HIROO
MDBELAYET ALI
MDBELAYET ALI
Application Number:
JP2022050403A
Publication Date:
October 06, 2023
Filing Date:
March 25, 2022
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA ELECTRONIC DEVICES & STORAGE CORP
TOSHIBA ELECTRONIC DEVICES & STORAGE CORP
International Classes:
G06F7/58; G09C1/00
Attorney, Agent or Firm:
Patent Attorney Corporation Itosin International Patent Office