Pseudo-random number generation based on periodic sampling of one or more linear feedback shift registers
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United States of America Patent
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Jul 24, 2012
Grant Date -
Feb 17, 2005
app pub date -
Aug 15, 2003
filing date -
Aug 15, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
One or more methods and systems of generating pseudo-random numbers that are used as encryption keys in cryptographic applications are presented. In one embodiment, a method of generating pseudo-random numbers is performed by sampling output sequences of a linear feedback shift register with a specified periodicity. In one embodiment, the generating of pseudo-random numbers using linear feedback shift registers is accomplished by periodically switching between iterative outputs generated by multiple linear feedback shift registers. In one embodiment, a method of encrypting a pseudo-random number generated by a linear feedback shift register comprises using a nonlinear operator. In one embodiment, a method of further encrypting a pseudo-random number is accomplished by using a hashing function whose initial value varies over time by way of a function operating on one or more variables. In one embodiment, an apparatus for generating pseudo-random numbers using linear feedback shift registers comprises a digital hardware.
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