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Journal of Nanjing University of Posts and Telecommunications

Three-Party Authenticated Quantum Key Distribution Protocol Based on Entangled Swapping

Hanwu Chen

Published Jan 1, 2011• 0 citations
OpenAlex

Abstract

In order to improve the security of quantum key distribution(QKD) protocol,a three-party authenticated QKD protocol based on entangled swapping is proposed.It is shown that this protocol not only has the function of authentication,but also resist security problem bring from the TC' dishonesty.

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In order to distribute a secret key between two designated users, a mutually authenticated quantum key distribution (QKD) protocol based on entanglement swapping is proposed. Without classical information exchange, the two communication parts can securely share a session key in this protocol. Almost all qubits, except a few which are used to check the security of quantum channel, can produce the private key, and two pairs of entangled particles can generate two bits private key. The protocol is proved to secure using Stinespring dilation theorem, and the efficiency analysis is presented.
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A multi-party multi-level quantum key distribution protocol based on entanglement swapping is proposed. A perfect complete orthonormal basis of the bi-party three-level systems is first constructed. By using this basis and swapping the entanglement, bi-party quantum key distribution is realized. In addition, three-level can be generalized to multi-level and bi-party to multi-party,i.e., multi-party multi-level quantum key distribution based on entanglement swapping can be achieved. Using entanglement swapping and multi-level key distribution can significantly increase the efficiency of the detection of eavesdropping, the key generation rate and the information flux.
This work presents quantum key distribution protocols (QKDPs) to safeguard security in large networks, efficiency is improved as the proposed protocols contain the fewest number of communication rounds and two parties can share and use a long-term secret Key. Quantum cryptography is basically based on a trusted channel in communication between two parties compared to classical channel. Recently, Quantum Key Distribution (QKD) has become more secure transmission method used to transmit secret key between two legitimate parties. This paper discusses the implementation of (QKD) protocol with the existence of an eavesdropper. The implementation simulates the communication of two parties who wish to share a secret key with the existing of eavesdropper. The existing of eavesdropper is simulated with two kinds of attacks, which is used as parameter to measure the length of final key agreed by both authenticated parties at the end of the communication.
Quantum Key Distribution (QKD) allows two legitimate parties to establish a secret key with informationtheoretic security. However, existing protocols have a very low noise tolerance, limiting their deployment in practical quantum channels with finite resources. We propose a novel QKD protocol based on entanglement swapping that achieves higher noise tolerance and improved key rates. In the proposed protocol, a six-bit symbol is encoded in a six-qubit state formed by randomly grouping the state into three pairs to form three Bell states. The proposed protocol maintains a positive secrecy rate for eavesdropper interception probabilities approaching 100 % under the intercept-and-resend attack model, significantly outperforming existing protocols in the literature.