Method and System for OCDM-Based Photonic Layer Security Robustness to Spoof Data Integrity

A method for identifying fraudulent encrypted data embodied on an optical receiver, the method comprising:

• scrambling an encoded data signal using dynamically changing scramble code;
• transmitting the scrambled encoded data signal over a network;
• descrambling the scrambled encoded data signal using a descramble code corresponding to a compliment of the dynamically changing scramble code;
• analyzing the descrambled encoded data signal to search for a region of low error between descrambled data and noise;
• notifying of a possible spoofing attempt when a region of low error is not found;
• and
• decoding the descrambled encoded data signal using a compliment of phase codes originally used for encoding the encoded data signal in order to generate a decoded signal to retrieve a desired data signal when a region of low error is found.

An optical receiver for receiving encrypted data, the optical receiver comprising:

• a spectral phase descrambler for descrambling a received encrypted signal using a descramble code as a decryption key to generate a descrambled data signal, the descramble code being a compliment to a scramble code originally used for scrambling the encrypted signal;
• a signal processor for analyzing the descrambled encoded data signal to search for a region of low error between descrambled data and noise, and providing notification of a possible spoofing attempt when the signal processor fails to find a region of low error;
• a plurality of spectral phase decoders for applying to the descrambled data signal an compliment of phase codes originally used for encoding the encrypted signal when the signal processor finds a region of low error in order to generate a decoded signal, each spectral phase decoder being a conjugate match to a spectral phase encoder;
• a respective optical time gate coupled to each of the plurality of spectral phase decoders, for time gating the decoded signal to isolate a desired data signal;
• and
• a demodulator coupled to the optical time gate for detecting and demodulating the desired data signal to retrieve user data.