Communications: electrical – Digital comparator systems
Reexamination Certificate
2005-07-19
2005-07-19
Wambach, Margaret R. (Department: 2816)
Communications: electrical
Digital comparator systems
C377S033000, C377S051000, C377S054000, C380S267000, C714S728000, C714S739000, C714S761000, C714S787000
Reexamination Certificate
active
06919794
ABSTRACT:
A circuit for controlling the random character of a bit flow, including an input shift register receiving the bit flow and having its outputs exploited in parallel, at least one element for comparing at least a partial content of the input register with predetermined patterns, a plurality of counters in a number at most equal to the number of predetermined patterns, and an element for detecting the exceeding of at least one threshold by one of the counters, the result of this detection conditioning the state of a word or bit indicative of the random or non-random character of the bit flow.
REFERENCES:
patent: 3217145 (1965-11-01), Suski
patent: 3582882 (1971-06-01), Titcomb et al.
patent: 5956401 (1999-09-01), Harrison
French Search Report from French Patent Application 03/07088, filed Jun. 12, 2003.
J. Phillips: “Algorithm AS 48. Uncertainty Function for a Binary Sequence” Applied Statistics, vol. 21, 1972, pp. 97-99, XP0008029574 Royal Statistical Society, London, GB.
A. Rukhin et al.: “A statistical test suite for random and pseudorandom number generators for cryptographic applications” May 15, 2001, XP002276676, pp. iv-x, 29-36, 46-49, 77, 78, 87-89.
Anguille Claude
Bardouillet Michel
Malherbe Alexandre
Orlando William
Jorgenson Lisa K.
Morris James H.
STMicroelectronics S.A.
Wambach Margaret R.
Wolf Greenfield & Sacks P.C.
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