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In this paper, a novel deterministic secure quantum communication scheme with four-qubit W states is proposed. By utilizing four kinds of unitary operations, the two legitimate users can directly transmit the secret messages based on the Bell measurements and some additional classical information. Analysis shows that our scheme has a high capacity as each W state can carry two bits of secret information,...
A novel efficient deterministic secure quantum communication protocol with four-qubit cluster states is proposed. By making Bell measurement and single-photon measurement, the two legitimate users can transmit the secret messages after exchanging some additional classical information. It has a high capacity as each cluster state can carry three bits of classical information, and its total efficiency...
In this paper, a novel authenticated quantum secure direct communication scheme with three-dimension single photons is presented, where the message is encoded on batches of qutrits, and identity is mutual authenticated with their shared seed key. Security analysis shows that this scheme can efficiently resist Eve's attacks and the impersonator's attacks. Comparing with those protocols using entangled...
In the multiparty communication, there are two types of Communication modes: the many-to-one mode and the one-to-many mode. In this paper, two efficient authenticated multiparty quantum secure direct communication protocols are presented by using GHZ states and dense coding, one is used for the many-to-one communication, and the other is suitable to the one-to-many communication. Analysis shows these...
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