两方量子密钥协商协议的改进

doi:10.3969/j.issn.1001-2400.2015.01.014

Abstract

Abstract:

To avoid the weakness that the sender can fully control the shared key alone in the Hsueh and Chen's two-party quantum key agreement (QKA) protocol with maximally entangled states, a possible solution is presented by adding the receiver's unitary operation. The unitary operation instead of the security checking is utilized, which makes this protocol fundamentally meet the basic requirement that in a quantum key agreement each participant equally contribute to the generation and distribution of the shared key. Therefore the security against the participant attack is based on basic physical principles rather than on the checking photons technique. Security analysis shows that this protocol is secure against the outside attack and participant attack. Compared with the previous improved protocol, the weakness is avoided with less qubits and the efficiency of the protocol is improved.

Key words: quantum communication, quantum key agreement, maximally entangled states, quantum cryptography

SHEN Dongsu;MA Wenping;YIN Xunru;WANG Lili. Improvement of a two-party quantum key agreement protocol[J].J4, 2015, 42(1): 86-90+186.

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Improvement of a two-party quantum key agreement protocol

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