Boots – shoes – and leggings
Patent
1997-03-05
1998-07-14
Mai, Tan V.
Boots, shoes, and leggings
380 46, G06F 102
Patent
active
057814589
ABSTRACT:
A method and apparatus for generating truly random numbers which may be used in a cryptographic key generator is adapted to extract entropy from the output signal of an RC oscillating circuit comprised of a resistor, a capacitor, and two nand gates. The entropy data is extracted by comparing the period of a first cycle with the period of a second cycle where the first and second periods are separated by two cycles. If the compared periods are equal, the data is discarded. If the previous period is greater than the later period, a "1" is assigned to a shift register. Otherwise, a ".O slashed." is assigned to the shift register. In this way, a plurality of bits are assigned to the shift register. A routine is then called which processes the bit data to reduce any cycle to cycle data correlation.
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Mai Tan V.
Transcrypt International, Inc.
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