Secure optical frequency comb (ofc), two-way optical time transfer (twott) system and associated method

An optical frequency comb (OFC), two-way optical time transfer (TWOTT) system comprising:

• a first node comprising
• a first OFC transmitter configured to generate a first polarization-modulated OFC signal over an optical fiber path based on a first random sequence,
• a first OFC detector configured to detect a second polarization-modulated OFC signal over the optical fiber path, and
• a first processor coupled to the first OFC detector;
• and
• a second node comprising
• a second OFC transmitter configured to generate the second polarization-modulated OFC signal over the optical path based on a second random sequence,
• a second OFC detector configured to detect the first polarization-modulated OFC signal over the optical fiber path, and
• a second processor coupled to the second OFC detector;
• the first and second processors configured to communicate over a public channel path to determine a man-in-the-middle (MITM) attack along the optical fiber path.

An optical frequency comb (OFC), two-way optical time transfer (TWOTT) method comprising:

• operating a first node comprising
• a first OFC transmitter configured to generate a first modulated OFC signal over an optical path based on a first random sequence,
• a first OFC detector configured to detect a second modulated OFC signal over the optical path, and
• a first processor coupled to the first OFC detector;
• and
• operating a second node comprising
• a second OFC transmitter configured to generate the second modulated OFC signal over the optical path based on a second random sequence,
• a second OFC detector configured to detect the first modulated OFC signal over the optical path, and
• a second processor coupled to the second OFC detector;
• operating the first and second processors to communicate over a public channel path to determine a man-in-the-middle (MITM) attack along the optical path.