Aaron D. Wyner information-theoretic security one-time pad Roy J. Glauber E. C. George Sudarshan coherent state
The principle of operation is as follows. First, legitimate users share a key and change it to a pseudo-random keystream using the same pseudo-random number generator. Then, the legitimate parties can perform conventional optical communications based on the shared key (advantage creation) by transforming it appropriately. For attackers who do not share the key, the wire-tap channel model of Aaron D. Wyner is implemented, and the goal is to achieve longer covert communication than the information-theoretic security limit (one-time pad) set by Shannon. The source of the noise in the above wire-tap channel is the uncertainty principle of the electromagnetic field itself, which is a theoretical consequence of the laser light theory by Roy J. Glauber and E. C. George Sudarshan (coherent state).


 Therefore, existing technology is sufficient for implementation. Furthermore, since it uses ordinary communication laser light, it is compatible with existing communication infrastructure and can be used for high-speed 
and long-distance communication and routing.




