Quantum key distribution (QKD) in TLS 1.3 protocol

Abstract

The paper discusses an architectural model for integrating quantum key distribution (QKD) into the TLS 1.3 protocol to improve its resistance to quantum attacks. The authors analyze the cryptographic limitations of traditional asymmetric algorithms, such as RSA and ECC, in the context of the emergence of quantum computing, and justify the feasibility of using QKD as a physically secure source of symmetric keys. The proposed model allows for minimizing changes to the TLS 1.3 structure using PSK or DH replacement mechanisms, and supports fallback compatibility with existing TLS libraries. The paper describes the technical prerequisites, protocol modifications, messaging logic, and the benefits and challenges associated with implementing QKD in classical network environments. In particular, it emphasizes the physical level of forward secrecy, the complexities of QKD scaling, and the need for standardization. The presented solution is positioned as a practical step towards building a quantum-resistant digital infrastructure with a high level of security for critical communication systems.