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Optics Communications

Secure authentication of classical messages with decoherence-free states

Tian‐Yin Wang, Qiaoyan Wen, Fu-Chen Zhu

Published Jun 12, 2009• 24 citations
Publisher
DOI
10.1016/j.optcom.2009.05.036

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Two faithful quantum secure communication and authentication schemes based on Bell states and classical XOR operation are proposed, which withstand collective noises.The authentication and eavesdropping detection are completed by using logical decoy photons generating by previously shared identity string.The logical decoy photons are decoherence-free states over the two collective noisy channels respectively.The transmission of secret message is a one-time pad system, which guarantees the absolute security of secret message.Encoding secret message after particle transmission ensures the accuracy of secret message.
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Quantum authentication protocols can be used to authenticate both quantum messages and classical messages.In this paper, a new quantum authentication protocol of classical messages is proposed.In our protocol, a sequence of Bell states is shared by the message sender and the corresponding receiver.This sequence is used as the authentication key.Four different unitary operations U 0 , U 1 , U 2 and U 3 are used to encode a classical message m and its hash value h(m) into a sequence of Bell states.To authenticate the classical message, the message receiver extracts m and h(m) from the qubits owned by himself/herself, and verifies whether h(m) matches m.The adversary's disturbance to the quantum channel can be detected by checking whether h(m) matches m.The transmitted message has the properties of both secrecy and authentication.Our quantum authentication protocol is secure against message attack and no-message attack.