检索结果-南通市图书馆

维普期刊数据库

Multi-proxy quantum group signature scheme with threshold shared verification

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第2期17卷 415-418页

作者：杨宇光 College of Computer Science and Technology Beijing University of Technology State Key Laboratory of Information Security Graduate School of Chinese Academy of Sciences

A multi-proxy quantum group signature scheme with threshold shared verification is proposed. An original signer may authorize a proxy group as his proxy agent. Then only the cooperation of all the signers in the proxy group can generate the proxy signature on behalf of the original signer. In the scheme, any t or more of n receivers can verify the message and any t - 1 or fewer receivers cannot verify the validity of the proxy signature.

关键词： quantum signature multi-proxy quantum group signature threshold shared verification

维普期刊数据库

Batch proxy quantum blind signature scheme

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2013年第5期56卷 202-210页

作者： SHI JinJing SHI RongHua GUO Ying PENG XiaoQi TANG Ying School of Information Science and Engineering Central South University Department of Information Science & Engineering Hunan First Normal University School of Physics Science and Technology Central South University

Motivated by proxy signature and blind signature for the secure communications,the batch signature is proposed to create a novel quantum cryptosystem.It is based on three-dimensional two-particle-entangled quantum system which is used to distribute the quantum keys and create strings of quantum-trits(qutrits) for messages.All of the messages,which are expected to be signed,are encrypted by the private key of the message owner during communications.Different from the classical blind signature,an authenticity verification of signatures and an arbitrator’s efficient batch proxy signature are simultaneously applied in the present scheme.Analysis of security and efficiency shows that it enables us to achieve a large number of quantum blind signatures for quantities of messages with a high efficiency with the arbitrator’s secure batch proxy blind signature.

关键词： quantum cryptography quantum signature blind signature proxy signature batch signature

The security analysis of a threshold proxy quantum signature scheme

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2013年第3期Mechanics & Astronomy) .卷 519-523页

作者： SHI JianHong ZHANG ShengLi CHANG ZhengGang The PLA Information Engineering University

In the YW threshold proxy quantum signature scheme proposed by Yang and Wen,it is found that the basic signature key is the same as the basic verification key,which means that the bitwise exclusive OR(XOR) of the t proxy signature keys is exactly the XOR of the t proxy verification keys.Therefore,the proxy signers can deny their signature and the specific verifiers can forge a legal signature.Furthermore,an attacker can obtain a legal threshold proxy signature for an arbitrary new message.These findings show that there are hidden security loopholes that should be carefully constructed in designing more efficent YW-scheme.

关键词： quantum cryptography quantum signature threshold proxy signature secret sharing

quantum homomorphic broadcast multi-signature based on homomorphic aggregation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第7期32卷 254-261页

作者：徐鑫殷爱菡 Department of Information Engineering East China JiaoTong UniversityNanchang 330013China

quantum multi-signature has attracted extensive attention since it was put forward.Beside its own improvement,related research is often combined with other quantum signature.However,this type of quantum signature has one thing in common,that is,the generation and verification of signature depend heavily on the shared classical secret key.In order to increase the reliability of signature,the homomorphic aggregation technique is applied to quantum multi-signature,and then we propose a quantum homomorphic multi-signature protocol.Unlike previous quantum multi-signature protocols,this protocol utilizes homomorphic properties to complete signature generation and verification.In the signature generation phase,entanglement swapping is introduced,so that the individual signatures of multiple users are aggregated into a new multi-signature.The original quantum state is signed by the shared secret key to realize the verification of the signature in the verification phase.The signature process satisfies the homomorphic property,which can improve the reliability of the signature.

关键词： quantum signature homomorphic aggregation homomorphic multi-signature Bell state

维普期刊数据库