Data security arrangements for semiconductor programmable devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 7, 1995
Grant Date -
N/A
app pub date -
Oct 6, 1992
filing date -
Oct 11, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A programmable logic device comprises a semiconductor with configurable circuitry, an input circuit for encrypted data to determine the configuration of the circuitry, decrypting circuitry responsive to a key value held in a non-volatile data store, and volatile storage circuitry for holding decrypted configuration data. Encrypting circuitry uses the same key value to encrypt configuration data and stores the encrypted configuration data for use in the programmable logic device.
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