UNAUTHORIZED ACCESS TO QUANTUM KEY DISTRIBUTION SYSTEM
Anton Pavlovich Pljonkin · Известия Южного федерального университета. Технические науки · 2024
The paper examines the latest research and trends in safeguarding data transmission through stateof-the-art cryptographic techniques. It details the encryption and decryption process using the one-timepad method, also known as the Vernam cipher, renowned for its unparalleled security. The work showcasescommon challenges addressed by quantum cryptography, which encompasses concepts like outcomeunpredictability, quantum entanglement, and the Heisenberg uncertainty principle. The paper discussesthe use of symmetric algorithms for data encryption and sets forth standards for encryption keys that ensurethe absolute confidentiality of data exchange. It provides a concise history of quantum communicationsand cryptography development, highlighting the critical need for ongoing research in this domain.A pivotal aspect of cryptographic security, the distribution of encryption keys to legitimate users, is underscored.Quantum cryptography presents a method for generating and sharing keys derived from quantummechanical principles, integral to quantum key distribution (QKD) systems. Contemporary QKD systemsundergo extensive scrutiny, including their susceptibility to various attack types, with most research aimedat identifying potential weaknesses in quantum protocols, often due to technical flaws in QKD systemcomponents. The study addresses a technique for unauthorized access to QKD systems during detectorcalibration. Furthermore, the paper explores a strategy for illicitly infiltrating the operations of a quantumkey distribution system in calibration mode and suggests a defensive approach. Field research findingsare presented, revealing that QKD systems are prone to vulnerabilities not only during quantum protocolexecution but also throughout other crucial operational phases. The identified attack method enablesthe unauthorized acquisition of data from a quantum communication channel and the manipulation ofsystem operations. A design for auto-compensating optical communication systems is proposed to protectthe calibration process against unauthorized breaches. The impact of sync pulses, reduced to singlephotonlevels, on accurately detecting timing intervals with an optical signal is demonstrated. The articleconcludes with experimental results that exhibit variances between theoretical expectations and the actualperformance of individual components within a quantum communication system.