Microprocessor intended particularly for executing the calculation algorithms of a public code encoding system
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United States of America Patent
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Feb 21, 1989
Grant Date -
N/A
app pub date -
Nov 30, 1983
filing date -
Nov 30, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
One chip microprocessor, which is more particularly designed to execute culation algorithms of a public code encoding system formed by a public function and a secret inverse function of the type comprising at least one programmable read-only memory, a processing unit and an input/output device, wherein it comprises a memory, in which is recorded at least one algorithm corresponding to the performance of said secret function, and wherein the programmable read-only memory contains the secret parameters constituting the secret code and recorded in an area of the read-only memory which is inaccesible from the outside, the processing unit including the multiplying circuits necessary for the execution of the algorithm.
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