A comparative analysis of error correction techniques used for QKD protocols

Rainu Nandal, Ashish Nandal, Kamaldeep Joshi +1 more

Amina Alkilany Abdallah Dallaf

Abstract this paper proposes an optimized Quantum Key Distribution (QKD) protocol using entanglement swapping techniques to extend transmission range and improve error correction. Additionally, integrates an advanced error correction technique which is Low Density Parity Check (LDPC) and multi-hop quantum repeaters for more enhancement of the protocol performance. Hybrid Quantum Classical Error Correction Methods is applied ensuring compatibility and optimal performance and to manage the increased complexity. Simulations prove that 25% improvement in transmission distance with entanglement swapping. 50% improvement with advanced error correction and a 100% improvement with multi-hop quantum repeaters compared to existing protocols. These discoveries are supported by both theoretical analysis and simulation results, indicating significant decreases in error rates and extensions in maximum transmission distances. Comparative analysis made with existing protocols and that demonstrated the superiority of proposed approach in terms of extended secure communication distance, higher key generation rate and improved resilience to attacks.

Heesun Won, Jieun Ryu, Ju-Sung Kang +1 more

SujayKumar Reddy M, Chandra Mohan B

Quantum Key Distribution (QKD) is a technique that enables secure communication between two parties by sharing a secret key. One of the most well-known QKD protocols is the BB84 protocol, proposed by Charles Bennett and Gilles Brassard in 1984. In this protocol, Alice and Bob use a quantum channel to exchange qubits, allowing them to generate a shared key that is resistant to eavesdropping. This paper presents a comparative study of existing QKD schemes, including the BB84 protocol, and highlights the advancements made in the BB84 protocol over the years. The study aims to provide a comprehensive overview of the different QKD schemes and their strengths and weaknesses and demonstrate QKDs working principles through existing simulations and implementations. Through this study, we show that the BB84 protocol is a highly secure QKD scheme that has been extensively studied and implemented in various settings. Furthermore, we discuss the improvements made to the BB84 protocol to enhance its security and practicality, including the use of decoy states and advanced error correction techniques. Overall, this paper provides a comprehensive analysis of QKD schemes, focusing on the BB84 protocol in secure communication technologies.

Peter Y. A. Ryan, Bruce Christianson

Heejeung Won, Jieun Ryu, Ju-Sung Kang +1 more

In a quantum key distribution (QKD) system, the shared secret, called sifted key between the participants may not match due to the inherent properties of the noisy quantum channel. Thus, error correction protocols are indispensable. CASCADE is one of the most popular (currently the standard) error correction protocol in QKD based on parity exchange followed by binary search. In this study, we compare four Trace-Back algorithms in CASCADE and experimentally analyze their efficiency. Up to QBER 5%, we recommend the variant, TraceBack2First, as the most optimized approach, and comparatively analyze its efficiency in terms of communication with CASCADE. Through experiments, we examine that TraceBack2First is effective in reducing communication passes and memory usage, and expect it to be applicable to commercial QKD systems.