As a kind of landscape resources, agricultural landscapes play a crucial role in rural tourism. It is a new attempt by taking agricultural landscapes into the development system of scenic spot for their mutual support...As a kind of landscape resources, agricultural landscapes play a crucial role in rural tourism. It is a new attempt by taking agricultural landscapes into the development system of scenic spot for their mutual support and promotion. With the detail plan of Yanmen Mountain Scenic Spot in Zhaixing Mountain Scenic Area as a study case, the authors studied how to take agricultural landscapes into the development system of scenic spot.展开更多
The communication complexity of the practical byzantine fault tolerance(PBFT)protocol is reduced with the threshold signature technique applied to the consensus process by phase voting PBFT(PV-PBFT).As most communicat...The communication complexity of the practical byzantine fault tolerance(PBFT)protocol is reduced with the threshold signature technique applied to the consensus process by phase voting PBFT(PV-PBFT).As most communication occurs between the primary node and replica nodes in PV-PVFT,consistency verification is accomplished through threshold signatures,multi-PV,and multiple consensus.The view replacement protocol introduces node weights to influence the election of a primary node,reducing the probability of the same node being elected primary multiple times.The experimental results of consensus algorithms show that compared to PBFT,the communication overhead of PV-PBFT decreases by approximately 90% with nearly one-time improvement in the throughput relative and approximately 2/3 consensus latency,lower than that of the scalable hierarchical byzantine fault tolerance.The communication complexity of the PBFT is O(N^(2)),whereas that of PV-PBFT is only O(N),which implies the significant improvement of the operational efficiency of the blockchain system.展开更多
Due to the compromise of the security of the underlying system or machine stonng the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect ...Due to the compromise of the security of the underlying system or machine stonng the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect private keys. To deal with the private （signing） key exposure problem in identity-based signature systems, we propose an identity-based threshold key-insulated signature （IBTKIS） scheme. It strengthens the security and flexibility of existing identity-based key-insulated signature schemes. Our scheme＇ s security is proven in the random oracle model and rests on the hardness of the computational Diffie-Helhnan problem in groups equipped with a pairing. To the best of our knowledge, it is the first IBTKIS scheme up to now.展开更多
A proactive threshold signature scheme is very important to tolerate mobile attack in mobile ad hoc networks. In this paper, we propose an efficient proactive threshold RSA signature scheme for ad hoc networks. The sc...A proactive threshold signature scheme is very important to tolerate mobile attack in mobile ad hoc networks. In this paper, we propose an efficient proactive threshold RSA signature scheme for ad hoc networks. The scheme consists of three protocols: the initial secret share distribution protocol, the signature generation protocol and the secret share refreshing protocol. Our scheme has three advantages. First, the signature generation protocol is efficient. Second, the signature generation protocol is resilient. Third, the share refreshing protocol is efficient.展开更多
The genus Gaeolaelaps Evans & Till from China,including 20 species,is reviewed and an identification key to the Chinese species is provided.G.gillespiei Beaulieu,2009 is reported from China for the first time,with...The genus Gaeolaelaps Evans & Till from China,including 20 species,is reviewed and an identification key to the Chinese species is provided.G.gillespiei Beaulieu,2009 is reported from China for the first time,with redescription and illustrations.Three new mammal hosts are reported (Anourosorex squamipes,Eothenomys miletus and Rattus steni).展开更多
The conventional ring signature schemes cannot address the scenario where the rank of members of the ring needs to be distinguished, for example, in electronically commerce application. To solve this problem, we prese...The conventional ring signature schemes cannot address the scenario where the rank of members of the ring needs to be distinguished, for example, in electronically commerce application. To solve this problem, we presented a Trusted Platform Module （TPM）-based threshold ring signature schen. Employing a reliable secret Share Distribution Center （SDC）, the proposed approach can authenticate the TPM-based identity rank of members of the ring but not track a specific member＇s identity. A subset including t members with the same identity rank is built. With the signing cooperation of t members of the subset, the ring signature based on Chinese remainder theorem is generated. We proved the anonymity and unforgeability of the proposed scheme and compared it with the threshold ring signature based on Lagrange interpolation polynomial. Our scheme is relatively simpler to calculate.展开更多
The focus of this paper is to design an efficient and secure solution addressing the semi trusted issue in proxy re-signature schemes, i.e., the proxy knows the re-signature key from user A to user B, so he is able to...The focus of this paper is to design an efficient and secure solution addressing the semi trusted issue in proxy re-signature schemes, i.e., the proxy knows the re-signature key from user A to user B, so he is able to translate any signatures made by user A to user B, which damages the essential requirement （＂non-repudiation＂ property） of proxy re-signature schemes. In this paper, the authors first define the security model for threshold proxy re-signature scheme, and then propose two threshold proxy re-signature schemes based on Ateniese-Hohenberger＇s and Shao-Cao-Wang-Liang＇s approach.展开更多
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 pr...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.展开更多
The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol compositio...The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol composition operation.In the paper,we propose the universal composability framework for the analysis of proxy threshold signature and present a universally composable secure proxy threshold signature scheme which is the first one in this area.The proposed scheme is suitable for the mobile agents,which should migrate across different environment through network.Furthermore,we give the concrete analysis of the reduction to prove the security of the proposed scheme.展开更多
文摘As a kind of landscape resources, agricultural landscapes play a crucial role in rural tourism. It is a new attempt by taking agricultural landscapes into the development system of scenic spot for their mutual support and promotion. With the detail plan of Yanmen Mountain Scenic Spot in Zhaixing Mountain Scenic Area as a study case, the authors studied how to take agricultural landscapes into the development system of scenic spot.
基金The National Key R&D Program of China(No.2020YFE0200600)。
文摘The communication complexity of the practical byzantine fault tolerance(PBFT)protocol is reduced with the threshold signature technique applied to the consensus process by phase voting PBFT(PV-PBFT).As most communication occurs between the primary node and replica nodes in PV-PVFT,consistency verification is accomplished through threshold signatures,multi-PV,and multiple consensus.The view replacement protocol introduces node weights to influence the election of a primary node,reducing the probability of the same node being elected primary multiple times.The experimental results of consensus algorithms show that compared to PBFT,the communication overhead of PV-PBFT decreases by approximately 90% with nearly one-time improvement in the throughput relative and approximately 2/3 consensus latency,lower than that of the scalable hierarchical byzantine fault tolerance.The communication complexity of the PBFT is O(N^(2)),whereas that of PV-PBFT is only O(N),which implies the significant improvement of the operational efficiency of the blockchain system.
基金Supported by the National Natural Science Foundation of China （No. 60970111, 61133014, 60903189, 60903020）.
文摘Due to the compromise of the security of the underlying system or machine stonng the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect private keys. To deal with the private （signing） key exposure problem in identity-based signature systems, we propose an identity-based threshold key-insulated signature （IBTKIS） scheme. It strengthens the security and flexibility of existing identity-based key-insulated signature schemes. Our scheme＇ s security is proven in the random oracle model and rests on the hardness of the computational Diffie-Helhnan problem in groups equipped with a pairing. To the best of our knowledge, it is the first IBTKIS scheme up to now.
文摘A proactive threshold signature scheme is very important to tolerate mobile attack in mobile ad hoc networks. In this paper, we propose an efficient proactive threshold RSA signature scheme for ad hoc networks. The scheme consists of three protocols: the initial secret share distribution protocol, the signature generation protocol and the secret share refreshing protocol. Our scheme has three advantages. First, the signature generation protocol is efficient. Second, the signature generation protocol is resilient. Third, the share refreshing protocol is efficient.
基金supported by the National Natural Science Foundation of China (31501847, 31093430)the Key Research and Development Program of Shandong Province (2016GNC110012, 2017CXGC0207)the Funds of Shandong “Double Tops” Program (SYL2017XTTD06)
文摘The genus Gaeolaelaps Evans & Till from China,including 20 species,is reviewed and an identification key to the Chinese species is provided.G.gillespiei Beaulieu,2009 is reported from China for the first time,with redescription and illustrations.Three new mammal hosts are reported (Anourosorex squamipes,Eothenomys miletus and Rattus steni).
基金Acknowledgements This work was supported by the National Basic Research Program of China under Crant No. 2007CB311100, Core Electronic Devices, High-end General Purpose Chips and Basic Software Products in China under Oant No. 2010ZX01037-001-001 Ph.D. Start-up Fund of Beijing University of Technology under Grants No. X0007211201101 and No. X00700054R1764, National Soft Science Research Program under Crant No. 2010GXQ5D317 and the National Natural Science Foundation of China underGrant No. 91018008 ,Opening Project of Key Lab of Information Network Security, Ministry of Public Security under Crant No. C11610, Opening Project of State Key Laboratory of Information Security （Institute of Sottware, Chinese Academy of Sciences） under Cxant No. 04-04-1.
文摘The conventional ring signature schemes cannot address the scenario where the rank of members of the ring needs to be distinguished, for example, in electronically commerce application. To solve this problem, we presented a Trusted Platform Module （TPM）-based threshold ring signature schen. Employing a reliable secret Share Distribution Center （SDC）, the proposed approach can authenticate the TPM-based identity rank of members of the ring but not track a specific member＇s identity. A subset including t members with the same identity rank is built. With the signing cooperation of t members of the subset, the ring signature based on Chinese remainder theorem is generated. We proved the anonymity and unforgeability of the proposed scheme and compared it with the threshold ring signature based on Lagrange interpolation polynomial. Our scheme is relatively simpler to calculate.
基金supported in part by the National Natural Science Foundation of China under Grant Nos. 61033014,60970110,60972034the National 973 Program under Grant No.2007CB311201
文摘The focus of this paper is to design an efficient and secure solution addressing the semi trusted issue in proxy re-signature schemes, i.e., the proxy knows the re-signature key from user A to user B, so he is able to translate any signatures made by user A to user B, which damages the essential requirement （＂non-repudiation＂ property） of proxy re-signature schemes. In this paper, the authors first define the security model for threshold proxy re-signature scheme, and then propose two threshold proxy re-signature schemes based on Ateniese-Hohenberger＇s and Shao-Cao-Wang-Liang＇s approach.
基金supported by the National Natural Science Foundation of China (Grant No. 11204279)
文摘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.
基金the National Natural Science Foundation of China(Nos.60703031,60703004)the National High Technology Research and Development Program(863)of China(No.2006AA01Z4220the National Basic Research Program(973)of China(No.2007CB311201)
文摘The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol composition operation.In the paper,we propose the universal composability framework for the analysis of proxy threshold signature and present a universally composable secure proxy threshold signature scheme which is the first one in this area.The proposed scheme is suitable for the mobile agents,which should migrate across different environment through network.Furthermore,we give the concrete analysis of the reduction to prove the security of the proposed scheme.
