Device comprising encryption circuitry enabled by comparing an operating spectral signature to an initial spectral signature

摘要

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.