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1.
We present an (n,n) threshold quantum secret sharing scheme of secure direct communication using Greenberger-Horne-Zeilinger state and teleportation.After ensuring the security of the quantum channel,the sender encodes the secret message directly on a sequence of particle states and transmits it to the receivers by teleportation.The receivers can recover the secret message by combining their measurement results with the sender's result.If a perfect quantum channel is used,our scheme is completely secure because the transmitting particle sequence does not carry the secret message.We also show our scheme is secure for noise quantum channel. 相似文献
2.
DONG Li XIU Xiao-Ming GAO Ya-Jun CHI Feng 《理论物理通讯》2008,49(6):1495-1498
A theoretical scheme of quantum secure direct communication using teleportation is proposed. In the scheme, the sender needs to prepare a class of three-particle W states to use as quantum channel. The two communicators may communicate after they test the security of the quantum channel. The security of the protocol is ensured by quantum entanglement and quantum no-cloning theorem. The receiver can obtain the secret message determinately if the quantum channel is secure. 相似文献
3.
A theoretical scheme of quantum secure communication
using a class of three-particle W states is proposed. In the scheme, two
communicators may communicate after they test the security of the quantum
channel. The receiver can obtain the secret message determinately if the
quantum channel is safe. The present scheme can be realized without using
teleportation. 相似文献
4.
5.
A quantum secret sharing scheme is proposed by making use of quantum registers. In the proposed scheme, secret message state is encoded into multipartite entangled states. Several identical multi-particle entanglement states are generated and each particle of the entanglement state is filled in different quantum registers which act as shares of the secret message. Two modes, i.e. the detecting mode and the message mode, are employed so that the eavesdropping can be detected easily and the secret message may be recovered. The security analysis shows that the proposed scheme is secure against eavesdropping of eavesdropper and cheating of participants. 相似文献
6.
A new theoretical scheme for quantum secure direct communication is proposed, where four-qubit symmetric W state functions as quantum channel. It is shown that two legitimate users can directly transmit the secret messages by using Bell-basis measurements and classical communication. The scheme is completely secure if the quantum channel is perfect. Even if the quantum channel is unsecured, it is still possible for two users to perform their secure communication. One bit secret message can be transmitted by sending a bit classical information. 相似文献
7.
8.
A novel quantum dual signature scheme, which combines two signed messages expected to be sent to two diverse receivers Bob and Charlie, is designed by applying entanglement swapping with coherent states. The signatory Alice signs two different messages with unitary operations(corresponding to the secret keys) and applies entanglement swapping to generate a quantum dual signature. The dual signature is firstly sent to the verifier Bob who extracts and verifies the signature of one message and transmits the rest of the dual signature to the verifier Charlie who verifies the signature of the other message. The transmission of the dual signature is realized with quantum teleportation of coherent states. The analysis shows that the security of secret keys and the security criteria of the signature protocol can be greatly guaranteed.An extensional multi-party quantum dual signature scheme which considers the case with more than three participants is also proposed in this paper and this scheme can remain secure. The proposed schemes are completely suited for the quantum communication network including multiple participants and can be applied to the e-commerce system which requires a secure payment among the customer, business and bank. 相似文献
9.
提出一个受控的量子确定性安全通信方案,在通信过程中,纠缠GHZ态用作量子信道,秘密信息的编码和破解是通过受控的量子纠缠交换和局域酉变换实现的.此方案是安全的.关于此方案安全性的证明和两步方案[Phys.Rev.A 68 042317]的安全性是一样的.此方案也可以推广到有多方控制者参与的情形. 相似文献
10.
WANG Zhang-Yin YUAN Hao GAO Gan Shou-Hua 《理论物理通讯》2006,46(4):607-609
We present a robust (n, n)-threshold scheme for multiparty quantum secret sharing of key over two collectivenoise channels (i.e., the collective dephasing channel and the collective rotating channel) via three-photon mixed states, In our scheme, only if all the sharers collaborate together can they establish a joint key with the message sender and extract the secret message from the sender's encrypted message. This scheme can be implemented using only a Bell singlet, a one-qubit state and polarization identification of single photon, so it is completely feasible according to the present-day technique. 相似文献
11.
Quantum secure direct communication with quantum encryption based on pure entangled states 总被引:3,自引:0,他引:3
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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. 相似文献
12.
We present in this paper a quantum secure direct communication
(QSDC) protocol by using partially entangled states. In the scheme a
third party (Trent) is introduced to authenticate the participants.
After authentication, Alice can directly, deterministically and
successfully send a secret message to Bob. The security of the
scheme is also discussed and confirmed. 相似文献
13.
Qin-nan Zhang Cui-cui Li Yuan-hua Li Yi-you Nie 《International Journal of Theoretical Physics》2013,52(1):22-27
A novel quantum secure direct communication scheme based on four-qubit cluster states is proposed. In this scheme, the quantum channel between the sender Alice and the receiver Bob consists of an ordered sequence of cluster states which are prepared by Alice. After ensuring the security of quantum channel, Alice prepares the encoded Bell-state sequence, and performs Bell-basis measurements on the qubits at hand. Then Alice tells the measured results to Bob, and Bob also performs Bell-basis measurements on his own qubits. Finally Bob can get the secret information through the analysis of their measured results. In our scheme, the qubits carrying the secret message do not need to be transmitted in public channel. We show this scheme is determinate and secure. 相似文献
14.
Hong Lai Ming-Xing Luo Yong-Jian Xu Josef Pieprzyk Jun Zhang Lei Pan Mehmet A. Orgun 《理论物理通讯》2018,70(4):384-390
Since the use of a quantum channel is very expensive for transmitting large messages, it is vital to develop an effective quantum compression encoding scheme that is easy to implement. Given that, with the single-photon spin-orbit entanglement, we propose a quantum secret sharing scheme using orbital angular momentum onto multiple spin states based on Fibonacci compression encoding. In our proposed scheme, we can represent the frequency of any secret message which is typically collection of bits encodings of text or integers as a bitstring using the base Fibonacci sequence, which is encoded multiple spin states for secret shares transmitted to participants. We demonstrate that Fibonacci compression encoding carries excellent properties that enable us to achieve more robust quantum secret sharing schemes with fewer number of photons. 相似文献
15.
We propose a (L, n)-threshold quantum secret sharing protocol of secure direct communication following some ideas of Zhang's protocol [Phys. Lett. A 342 (2005) 60] and Tokunaga et al.'s protocol [Phys. Rev. A 71 (2005) 012314]. The sender distributes the classical secret shares to his or her n agents and each agent owns a secret share in advance. The sender's secure direct communication message can be extracted by an agent subset by collaboration in such a way that at least t or more agents can obtain the secret message with the mutual assistances but any t - 1 or fewer agents cannot. In contrast to the previous multiparty quantum secret sharing protocols in which the sender's secret message can be recovered only if all the agents collaborate, our protocol is more practical and more flexible. 相似文献
16.
We propose two schemes for realizing quantum secure direct communication (QSDC) by using a set of ordered two-photon three-dimensional hyperentangled states entangled in two degrees of freedom (DOFs) as quantum information channels. In the first scheme, the photons from Bob to Alice are transmitted only once. After insuring the security of the quantum channels, Bob encodes the secret message on his photons. Then Alice performs single-photon two-DOF Bell bases measurements on her photons. This scheme has better security than former QSDC protocols. In the second scheme, Bob transmits photons to Alice twice. After insuring the security of the quantum channels, Bob encodes the secret message on his photons. Then Alice performs two-photon Bell bases measurements on each DOF. The scheme has more information capacity than former QSDC protocols. 相似文献
17.
A multi-sender-controlled quantum teleportation scheme is proposed
to teleport several secret quantum states from different senders to
a distance receiver based on only one Einstein-Podolsky-Rosen (EPR)
pair with controlled-NOT (CNOT) gates. In the present scheme, several secret single-qubit quantum states are encoded into a multi-qubit entangled quantum state. Two communication modes, i.e.,
the detecting mode and the message mode, are employed so that the
eavesdropping can be detected easily and the teleported message may
be recovered efficiently. It has an advantage over teleporting
several different quantum states for one scheme run with more
efficiency than the previous quantum teleportation schemes. 相似文献
18.
GUO Ying CHEN Zhi-Gang HUANG Da-Zu ZENG Gui-Hua 《理论物理通讯》2008,49(1):93-99
Exploiting the encoding process of the stabilizer quantum code [[n, k, d]], a deterministic quantum communication scheme, in which n - 1 photons are distributed forward and backward in two-way channel, is proposed to transmit the secret messages with unconditional security. The present scheme can be implemented to distribute the secret quantum (or classical) messages with great capacity in imperfect quantum channel since the utilized code encodes k-qubit messages for each scheme run. 相似文献
19.
YI Xiao-Jie NIE Yi-You ZHOU Nan-Run HUANG Yi-Bing HONG Zhi-Hui LI Song-Song 《理论物理通讯》2008,50(1):81-84
We present a scheme for quantum secure direct communication, in which the message is encoded by local unitary operations, transmitted through entangled photons, and deduced from both the sender and receiver's local measurement results. In such a scheme, only one pair of entangled photons is consumed, and there is no need to transmit the sender's qubit carrying the secret message in a public channel, in order to transmit two-bit classical information. 相似文献
20.
Ruigang Du Zhiwei Sun Banghai Wang Dongyang Long 《International Journal of Theoretical Physics》2012,51(9):2727-2736
Instead of sharing some sifted keys, quantum secret sharing of secure direct communication (QSS-SDC) allows a dealer Alice to share her secret message directly with a group of agents, who can then cooperate together to restore her message in a later time. However, we notice that, in order to recover the secret message, most existing QSS-SDC schemes require a quantum memory to store a resulting quantum state. As the technique of quantum memory is still not available today, we present a multiparty QSS-SDC protocol using quantum one time pad, which allows the agents to store their shares with classical binary strings. Moreover, the proposed scheme uses only single photons, which makes it easier to implement with current technology even when the number of the participants becomes large. 相似文献