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International Conference on Information Assurance and Security (IAS)

Quantum Secure Direct Communication Based on Partially Entangled States

Xin-yuan Yang, Zhi Ma, Xin Lü, LI Hong-xin

Published Jan 1, 2009• 4 citations
Publisher

Abstract

A new three-party quantum secure direct communication protocol with authentication is proposed. The advantage of the scheme is that through authentication one can confirm the sender's legitimate identity, partially entangled states used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. In ideal channel, the protocol is secure against incoherent attack.

DOI
10.1109/ias.2009.76

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A new three-party quantum secure direct communication protocol with authentication is proposed. The advantage of the scheme is that through authentication one can confirm the sender's legitimate identity, partially entangled states used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. In ideal channel, the protocol is secure against incoherent attack.
This paper proposes a new three-party quantum secure direct communication protocol with authentication. The scheme uses three-particle partially entangled states and CNOT gate to encode and decode. Two users can simultaneously transmit secret message to the third party,and partially entangled states shared can be used repeatedly. In ideal channel,the protocol is secure against incoherent attack. The advantage of the scheme is that through authentication,one can confirm the client's legitimate identity,partially entangled states are easy to prepare and store in practice,and two users can simultaneously communicate with the third party.
In this paper, we point out Partially Entangled States quantum dialogue, which enables both legitimate parties to exchange their 2 bit secret messages in a direct way. Two step security check guarantees the security of this protocol. Partially Entangled States used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. The protocol is secure against the intercept-resend attack and the entangle-measure attack.
In this paper, we point out Partially Entangled States quantum dialogue, which enables both legitimate parties to exchange their 2 bit secret messages in a direct way. Two step security check guarantees the security of this protocol. Partially Entangled States used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. The protocol is secure against the intercept-resend attack and the entangle-measure attack.
A novel two-party quantum secure direct communication protocol was proposed.By using ordered four-particle W state as carrier of information,encoding the secret message with unitary transformation,we can directly transmit secret message with local Bell-basis measurement and classical communication.In ideal channel,the protocol is secure against incoherent attack.The advantage of this scheme is that using W state is more little than GHZ state in energy loss and no quantum bit carrying secret message is transmitted in quantum channel.
We present a new quantum secure direct communication protocol with three-particle entangled state. The communication parties utilize decoy photons to check eavesdropping. The sender encodes the secret message with unitary transformation, we can directly transmit secret message with Bell-basis measurement and Z-basis measurement. The protocol is efficient in that all entangled states are used to transmit the secret message and two bits message can be transmitted one time, the preparation of three-particle entangled state is realized technique, the protocol is feasible to operate. The protocol is also verified to be secure for a noise quantum channel.