Research On Testing Technology Of Power Quantum Secure Communication System

Quantum secure communication technology is the combining product of quantum mechanics and cryptography.The basic principle of quantum mechanics ensures that keys can be safely distributed,and the eavesdropping behavior in quantum lines can be detected by both senders and receivers.The combination of quantum key distribution(QKD)and OTP encryption system can ensure absolute secure communication,and thus has a good application prospect in the power system.At present,the key performance indicators of quantum secure communication systems are basically obtained from QKD device or device network management.The relevant data is not reliable,and lacks testing methods and test standard specifications.There is also a lack of a common third-party test product on the market that can test and verify QKD devices from different company.At the same time,there are many types of power business and has high security requirements,test indicators and parameter requirements are different.Therefore,research on the test method of power quantum security communication system is of great significance.Because the grid environment is intricate,and quantum channel transmits weak single photon signals through optical fibers,which is susceptible to environmental impacts,it is necessary to carry out test and verification experiments of quantum secure communication systems in different power grid environments,and to study the adaptability of quantum secure communication systems in complex grid environments.This paper proposes a power quantum security communication test system and method,conducts test and verification experiments on power quantum security communication in the laboratory and power grid environment.The main contents are shown as follows:1.We study the theoretical basis of quantum key distribution,introduce BB84 protocol and decoy quantum communication protocol.Based on this,we model the phase-coded decoy QKD system.2.Through the demand analysis of test indicators for power quantum security communication system,we design a power quantum security communication test system.By controlling and obtaining the security key data of the quantum secure communication system,the test system can analysis and statistics key performance index parameters of the final security key.3.We analyze the post-processing process of QKD system,and give the QKD post-processing process model.Combining with post-processing process model we optimize test system architecture that can complete post-processing process of raw key,obtain raw key of the tested QKD system,calculate and analyze the initial and intermediate code rate of QKD system.4.Using existing experimental conditions,we build the software and hardware security test platform of power quantum security communication,test and verify the key performance indicators of QKD equipment such as security code rate,key consistency and key randomness,and test the effects of fiber optic environments on power quantum secure communication systems.5.We carry out a test of the phase-coded QKD system and its key performance indicators under natural environmental conditions such as wind vibration,dancing,and ice coating when passing the outdoor overhead OPGW cable,and verify the phase-type quantum secure communication system has a good grid environment adaptability.