检索结果-南通市图书馆

Threshold quantum secure direct communication without entanglement

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2008年第2期51卷 176-183页

作者： yang yuguang1,3 & wen qiaoyan2 1 college of computer science and technology, beij.ng university of technology, beij.ng 100022, china 2 School of science, beij.ng university of Posts and Telecommunications, beij.ng 100876, china 3 State Key Laboratory of Information Security (Graduate School of Chinese Academy of sciences), beij.ng 100049, china 1. college of computer science and technology Beijing University of Technology Beijing 100022 China 3. State Key Laboratory of Information Security (Graduate School of Chinese Academy of sciences) Beijing 100049 China 2. School of science Beijing University of Posts and Telecommunications Beijing 100876 China

For the first time, a threshold quantum secure direct communication (TQSDC) scheme is presented. Similar to the classical Shamir's secret sharing scheme, the sender makes n shares, S1, …, Sn of secret key K and each receiver keeps a share secretly. If the sender wants to send a secret message M to the receivers, he en-codes the information of K and M on a single photon sequence and sends it to one of the receivers. According to the secret shares, the t receivers sequentially per-form the corresponding unitary operations on the single photon sequence and ob-tain the secret message M. The shared shares may be reusable if it can be judged that there is no eavesdropper in line. We discuss that our protocol is feasible with current technology.

关键词： quantum secure direct communication threshold secure direct communication quantum secret sharing

Quantum threshold group signature

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1505-1514页

作者： yang yuguang1,2,3 & wen qiaoyan4 1 college of computer science and technology, beij.ng university of technology, beij.ng 100124, china 2 State Key Laboratory of Integrated Services Network, Xidian university, Xi’an 710071, china 3 State Key Laboratory of Information Security (Graduate university of Chinese Academy of sciences), beij.ng 100049, china 4 State Key Laboratory of Networking and Switching technology, beij.ng university of Posts and Tele-communications, beij.ng 100876, china college of computer science and technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

In most situations, the signer is generally a single person. However, when the message is written on behalf of an organization, a valid message may require the approval or consent of several persons. Threshold signature is a solution to this problem. Generally speaking, as an authority which can be trusted by all members does not exist, a threshold signature scheme without a trusted party appears more attractive. Following some ideas of the classical Shamir’s threshold signature scheme, a quantum threshold group signature one is proposed. In the proposed scheme, only t or more of n persons in the group can generate the group signature and any t-1 or fewer ones cannot do that. In the verification phase, any t or more of n signature receivers can verify the message and any t-1 or fewer receivers cannot verify the validity of the signature.

关键词： threshold quantum signature trusted party quantum cryptography

Threshold quantum secret sharing between multi-party and multi-party

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2008年第9期51卷 1308-1315页

作者： yang yuguang1,2,3 & wen qiaoyan4 1 college of computer science and technology,beij.ng university of technology,beij.ng 100124,china 2 State Key Laboratory of Integrated Services Network,Xidian university,Xi’an 710071,china 3 State Key Laboratory of Information Security (Graduate university of Chinese Academy of sciences),beij.ng 100049,china 4 State Key Laboratory of Networking and Switching technology,beij.ng university of Posts and Tele-communications,beij.ng 100876,china college of computer science and technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi’an 710071 China State Key Laboratory of Information Security (Graduate university of Chinese Academy of sciences) Beijing 100049 China State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

A threshold quantum secret sharing (TQSS) scheme between multi-party and multi-party was proposed using a sequence of single photons,which is useful and efficient when the parties of communication are not all present. We described the process of this TQSS scheme and discussed its security. It was shown that entan-glement is not necessary for quantum secret sharing. Moreover,the theoretic effi-ciency was improved to approach 100% as almost all the instances can be used for generating the private key,and each photon can carry one bit of information. This protocol is feasible with the present-day technique.

关键词： threshold quantum secret sharing quantum cryptography single photon multi-party and multi-party

Quasi-secure quantum dialogue using single photons

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2007年第5期50卷 558-562页

作者： yang yuguang1,2 & wen qiaoyan31 college of computer science and technology, beij.ng university of technology, beij.ng 100022, china 2 State Key Laboratory of Information Security, Graduate university of the Chinese Academy of sciences, beij.ng 100049, china 3 School of science, beij.ng university of Posts and Telecommunications, beij.ng 100876, china college of computer science technology Beijing University of Technology Beijing 100022 China State Key Laboratory of Information Security Graduate University of the Chinese Academy of Sciences Beijing 100049 China School of science Beijing University of Posts Telecommunications Beijing 100876 China

A quasi-secure quantum dialogue protocol using single photons was proposed. Different from the previous entanglement-based protocols, the present protocol uses batches of single photons which run back and forth between the two parties. A round run for each photon makes the two parties each obtain a classical bit of information. So the efficiency of information transmission can be increased. The present scheme is practical and well within the present-day technology.

关键词： quantum dialogue, single photon, quantum secure direct communication

Multiparty simultaneous quantum identity authentication with secret sharing

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： yang yuguang1,2,wen qiaoyan3 & ZHAng Xing4,5 1 college of computer science and technology,beij.ng university of technology,beij.ng 100022,china 2 State Key Laboratory of Information Security (Graduate university of the Chinese Academy of sciences),beij.ng 100049,china 3 School of science,beij.ng university of Posts and Telecommunications,beij.ng 100876,china 4 Institute of Electronic technology,Information Engineering university,Zhengzhou 450004,china 5 Trusted Computing Laboratory,beij.ng university of technology,beij.ng 100022,china college of computer science technology Beijing University of Technology Beijing 100022 China State Key Laboratory of Information Security [Graduate university of the Chinese Academy of sciences] Beijing 100049 China School of science Beijing University of Posts Telecommunications Beijing 100876 China Institute of Electronic technology Information Engineering University Zhengzhou 450004 China Trusted Computing Laboratory Beijing University of Technology Beijing 100022 China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

Quantum secure direct communication with cluster states

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2010年第7期53卷 1271-1275页

作者： CAO WeiFeng yang yuguang wen qiaoyan college of Electric and Information Engineering Zhengzhou University of Light IndustryZhengzhou 450002China State Key Laboratory of Networking and Switching technology Beijing University of Posts and TelecommunicationsBeijing 100876China college of computer science and technology Beijing University of TechnologyBeijing 100124China State Key Laboratory of Integrated Services Network Xidian UniversityXi’an 710071China State key Laboratory of Information Security Gradute university of Chinese Academy of sciences Beijing 100049China

A quantum secure direct communication protocol with cluster states is *** with the deterministic secure quantum communication protocol with the cluster state proposed by Yuan and Song(***.,2009,7:689),this protocol ca... 详细信息

关键词： quantum secure direct communication deterministic secure quantum communication cluster state

Fault tolerant quantum secret sharing against collective-amplitude-damping noise

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2011年第9期54卷 1619-1624页

作者： yang yuguang CHAI HaiPing WAng Yuan TEng YiWei wen qiaoyan college of computer science and technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi'an 710071 China State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China

We present a quantum secret sharing protocol against collective-amplitude-damping noise. Each logical qubit is encoded in two qubit noiseless states. So it can function over such a noisy channel. The two agents encode their messages on each logical qubit only by performing a permutation operation on two physical qubits. Although each logical qubit received by each agent only carries a bit of information, the boss Alice can read out her agents' information by discriminating two orthogonal states by performing single-qubit measurements assisted by local operation and classical communication (LOCC).

关键词： quantum secret sharing fault tolerant collective noise amplitude damping

Ultrasensitive and stable X-ray detection using zero-dimensional lead-free perovskites

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第10期29卷 299-306页

作者： Xiaojia Zheng Wei Zhao Peng Wang Hairen Tan Makhsud I.Saidaminov Shujie Tie Ligao Chen Yufei Peng Jidong Long wen-HuZhang Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsChengdu 610200SichuanChina Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900SichuanChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093JiangsuChina Departments of Chemistry and Electrical&computer Engineering Centre for Advanced Materials and Related Technologies(CAMTEC)University of VictoriaVictoria V8P 5C2BCCanada

Sensitive and reliable X-ray detectors are essential for medical radiography,industrial inspection and security *** the radiation dose allows reduced health risks and increased frequency and fidelity of diagnostic technologies for earlier detection of disease and its ***-dimensional(3 D)organic-inorganic hybrid lead halide perovskites are promising for direct X-ray detection-they show improved sensitivity compared to conventional X-ray ***,their high and unstable dark current,caused by ion migration and high dark carrier concentration in the 3 D hybrid perovskites,limits their performance and long-term operation *** we report ultrasensitive,stable X-ray detectors made using zero-dimensional(0 D)methylammonium bismuth iodide perovskite(MA3Bi2I9)single *** 0 D crystal structure leads to a high activation energy(Ea)for ion migration(0.46 e V)and is also accompanied by a low dark carrier concentration(~10^6 cm^-3).The X-ray detectors exhibit sensitivity of 10,620μC Gy-1 air cm-2,a limit of detection(Lo D)of 0.62 ng yairs-1,and stable operation even under high applied biases;no deterioration in detection performance was observed following sensing of an integrated X-ray irradiation dose of^23,800 m Gyair,equivalent to>200,000 times the dose required for a single commercial X-ray chest *** the ion migration channels and decreasing the dark carrier concentration in perovskites provide routes for stable and ultrasensitive X-ray detectors.

关键词： X-ray detector Zero-dimensional perovskite Lead-free Carrier concentration Stability Limit of detection Sensitivity