Programmable logic device that supports secure and non-secure modes of decryption-key access
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United States of America Patent
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Apr 29, 2008
Grant Date -
N/A
app pub date -
May 17, 2002
filing date -
Mar 29, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Described are programmable logic devices that decrypt proprietary configuration data using on-chip decryption keys. The keys are stored in a key memory that can be operated in a secure mode or a non-secure mode. The non-secure mode allows the decryption keys to be read or written freely; the secure mode bars read and write access to the decryption keys. The programmable logic device supports secure and non-secure modes on a key-by-key basis, allowing users to write, verify, and erase individual keys without affecting others.
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