Cryptography – Key management – Having particular key generator
Patent
1990-04-16
1991-04-09
Cangialosi, Salvatore
Cryptography
Key management
Having particular key generator
364717, H04L 904, H03K 384
Patent
active
050070878
ABSTRACT:
Information-theoretic notions are employed to establish the predictability of a random number generated from a circuit exhibiting chaos in order to obtain a number from a sequence of numbers with a known level of randomness and security. The method provides a measure of information loss whereby one may select the number of iterations before or between bit sampling in order to extract a secure pseudo-random number. A chaotic output is obtained by use of a sample and hold circuit coupled in a feedback loop to a variable frequency oscillator, such as a voltage controlled oscillator circuit, and operated with a positive Lyapunov exponent. A source signal generator, such as a periodic wave generator, provides a driving signal to the sample and hold circuit.
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Bernstein Greg M.
Lieberman Michael A.
Allen Kenneth R.
Cangialosi Salvatore
Loral Aerospace Corp.
Radlo Edward J.
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