Abstract
In this paper, we propose how to construct a reconciliation method for the BB84 Quantum Key Distribution (QKD) protocol. Theoretically, it is unconditionally secure because it is based on the quantum laws of physics, rather than the assumed computational complexity of mathematical problems. BB84 protocol performances can be reduced by various errors and information leakages such as limited intrinsic efficiency of the protocol, imperfect devices and eavesdropping. The proposed reconciliation method allowed to weed out these errors by using Turbo codes. Since their high error correction capability implies getting low errors, this method has high performance especially when compared to the last method presented in the literature based on Low-Density Parity Check codes (LDPC). In particular, we demonstrate that our method leads to a significant improvement of the protocol security and of the Bit Error Rate (BER) even with great eavesdropping capability.
Highlights
Public key cryptosystems based on some computational assumption, especially with large and randomly generated keys, are safe within the context of the current technology
We propose to resort to Turbo codes to accomplish reconciliation
We discuss the experimental performances of our reconciliation method
Summary
Public key cryptosystems based on some computational assumption, especially with large and randomly generated keys, are safe within the context of the current technology. Their safety can become weaker due to the incredibly high performance of quantum computers and the progress on cryptanalysis. (2014) Toward Efficient Quantum Key Distribution Reconciliation. This manuscript is organized as follows: In Section 2, we introduce the BB84 protocol. We focus on a recently presented method based on the well known LDPC codes. Some conclusions and perspectives are drawn in the sixth section
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