Experimental Research of the Mode of Quantum Keys Distribution

The autocompensation quantum key distribution system with phase coding of photon states is investigated. The principle of operation of a fiber-optic system for the distribution of quantum keys is described. The analysis of the synchronization mode and the formation of quantum keys is carried out. The description of the experimental stand of the quantum-cryptographic network is given. The description of the software of the receiving-transmitting and coding stations is given. It is shown that in the synchronization process the time interval is determined to within picoseconds. The process of creating a virtual tunnel between two stations is described. The description of the full cycle of integration of quantum keys into algorithms of data encryption of a telecommunication network is given. It is shown, how length of the quantum channel of communication influences the process of formation of quantum keys. The possibility of using 256-bit quantum keys in the AES encryption algorithm has been experimentally proven.