Concealed, non-intrusive watermarks for configuration bitstreams
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United States of America Patent
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Apr 14, 2009
Grant Date -
N/A
app pub date -
Aug 12, 2004
filing date -
Aug 12, 2004
priority date (Note) -
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Abstract
Various approaches for embedding identifier information in a configuration bitstream for a programmable logic device (PLD) are disclosed. In various embodiments, the bits in the configuration bitstream that are unused in implementing a the design are identified. The identifier information is encrypted, and a subset of the unused bits are selected using a pseudo-random function. The encrypted identifier information is placed in the selected subset of unused bits. Decryption is accomplished by reversing the encryption approach.
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