Title: A controlled multi-party quantum dialogue protocol in the network

Authors: Gang Cao; Min Jiang

Addresses: School of Electronics and Information Engineering, Soochow University, Suzhou 215006, China ' Key Laboratory of System Control and Information Processing, Ministry of Education, Shanghai, 200240, China

Abstract: A controlled multi-party quantum dialogue scheme in the network based on high dimensional multi-qudit entangled GHZ states is proposed. In our scheme, a semi-honest third party (TP) is introduced to assist the implementation of the scheme. Each user can be thought of as one node in the network and is connected by classical links and quantum links. In the network, multiple users can exchange their private messages with each other simultaneously under the control of TP. With the aid of secure classical channels and quantum channels, the proposed protocol can be ensured with unconditionally security. In addition, our protocol requires single-qudit measurements only which weakens the hardware requirements of network nodes. Compared with previous quantum dialogue protocols, our scheme demonstrates a large operating flexibility.

Keywords: quantum dialogue; multi-qudit entangled GHZ states; single-qudit measurement.

DOI: 10.1504/IJSCIP.2019.101077

International Journal of System Control and Information Processing, 2019 Vol.3 No.1, pp.26 - 38

Received: 16 Nov 2018
Accepted: 16 Nov 2018
Published online: 23 Jul 2019 *

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