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理论物理通讯：英文版

Controlled Secure Quantum Dialogue Using a Pure Entangled GHZ States

Song He

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

We present a controlled secure quantum dialogue protocol using a non-maximally (pure) entangled Greenberger-Horne-Zeibinger (GHZ) states at first,and then discuss the requirements for a real quantum dialogue. We show that the authorized two users can exchange their secret messages after purifying the non-maximally entangled GHZ states quantum channel unconditionally securely and simultaneously under the control of a third party.

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We present a controlled secure quantum dialogue protocol using a non-maximally (pure) entangled Greenberger-Horne-Zeibinger (GHZ) states at first,and then discuss the requirements for a real quantum dialogue. We show that the authorized two users can exchange their secret messages after purifying the non-maximally entangled GHZ states quantum channel unconditionally securely and simultaneously under the control of a third party.
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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.