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Journal of Hebei Normal University

Secure Communication Based on Single Photon States

Yan Feng-Li

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

A quantum key distribution and secure communication scheme using single photon states between two parties is proposed.It is more efficient in that it uses all single photon states in distributing the key except those chosen for checking eavesdroppers.In addition,security of the developed secure communication scheme could reach the one-time-pad level.

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A quantum key distribution and secure communication scheme using single photon states between two parties is proposed.It is more efficient in that it uses all single photon states in distributing the key except those chosen for checking eavesdroppers.In addition,security of the developed secure communication scheme could reach the one-time-pad level.
We present a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and decrypting the secret message carried by the traveling photons directly. For checking eavesdropping, the two parties perform the single-photon measurements on some decoy particles before each round. This scheme has the advantage that the pure entangled quantum signal source is feasible at present and any eavesdropper cannot steal the message.
This paper presents a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and decrypting the secret message carried by the travelling photons directly. For checking eavesdropping, the two parties perform the single-photon measurements on some decoy particles before each round. This scheme has the advantage that the pure entangled quantum signal source is feasible at present and any eavesdropper cannot steal the message.
Two deterministic secure quantum communication schemes are proposed, one based on pure entangled states and the other on ddd-dimensional single-photon states. In these two schemes, only single-photon measurements are required for the two authorized users, which makes the schemes more convenient than others in practical applications. Although each qubit can be read out after a transmission of additional classical bit, it is unnecessary for the users to transmit qubits double the distance between the sender and the receiver, which will increase their bit rate and their security. The parties use decoy photons to check eavesdropping efficiently. The obvious advantage in the first scheme is that the pure entangled source is feasible with present techniques.
Two quantum secure direct communication schemes are proposed based on pure entangled states and ddd-dimensional single-photon states, respectively. In these two schemes, only single-photon measurements are required for the two authorized users and two practical quantum signal sources are used for carrying information, which makes the schemes more convenient than others in a practical application. Although each qubit can be read out after a transmission of additional classical information, it is unnecessary for the users to transmit qubits carrying the secret message, which will increase their bit rate and their security. The parties use decoy photons to check eavesdropping efficiently.