Device comprising encryption circuitry enabled by comparing an operating spectral signature to an initial spectral signature
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 28, 2004
Grant Date -
N/A
app pub date -
Mar 30, 2000
filing date -
Mar 30, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device is disclosed comprising encryption circuitry for encrypting plaintext data into ciphertext data. A memory stores an initial spectral signature representing an initial spectral characteristic of the device, and a signal generator for generating an operating spectral signature representing an operating spectral characteristic of the device. A comparator compares the operating spectral signature to the initial spectral signature and enables the encryption circuitry if the operating spectral characteristic substantially matches the initial spectral characteristic.
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