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identity-based Key-Insulated Proxy Signature Without Random Oracles

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Journal of Shanghai Jiaotong university(Science) 2011年第5期16卷 557-566页

作者：陈剑洪龙宇陈克非王永涛 Department of Computer Science and Engineering Shanghai Jiaotong University School of Computer Engineering Huaiyin Institute of Technology Shanghai Key Laboratory of Scalable Computing and System Shanghai Jiaotong University

In an identity based proxy signature (IBPS) scheme, a designated proxy signer can generate the signature on behalf of an original signer. Traditional IBPS schemes normally rely on the assumption that private keys are kept perfectly secure. However, due to viruses, worms or other break-ins allowed by operating-system holes, key exposure seems inevitable. To minimize the damage caused by key exposure in IBPS, we propose an identity-based key-insulated proxy signature (IBKIPS) scheme in the standard model, i.e. without random oracles.

关键词： key-insulated proxy signature identity-based standard model

Updatable identity-based Hash Proof System based on Lattices and Its Application to Leakage-Resilient Public-Key Encryption Schemes

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Journal of Computer Science & Technology 2018年第6期33卷 1243-1260页

作者： Qi-Qi Lai Bo Yang Yong Yu Zhe Xia Yan-Wei Zhou Yuan Chen School of Computer Science Shaanxi Normal University Xi'an 710119 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China School of Computer Science and Technology Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an 710071 China

identity-based hash proof system is a basic and important primitive. Ittographic schemes and protocols that are secure against key-leakage attacks. In thisupdatable identity-based hash proof system, in which the related master secret keyis widely utilized to construct cryp-paper, we introduce the concept ofand the identity secret key can beupdated securely. Then, we instantiate this primitive based on lattices in the standard model. Moreover, we introduce anapplication of this new primitive by giving a generic construction of leakage-resilient public-key encryption schemes withanonymity. This construction can be considered as the integration of the bounded-retrieval model and the continual leakagemodel. Compared with the existing leakage-resilient schemes, our construction not only is more efficient but also can resistmuch more key leakage.

关键词： public-key encryption identity-based hash proof system lattice updatable leakage-resilience

An Improved identity-based Society Oriented Signature Scheme with Anonymous Signers

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 121-125页

作者： TANG Chunming School of Mathematics and Information Sciences/ Guangdong Province Key Laboratory Institute of Information Security Guangzhou University Guangzhou 510006 Guangdong China

In this paper, we present an improved identity-based society oriented signature scheme with anonymous signers, which satisfies：（1） when members leave or join an organization, the public verification key and the signature verification procedure are unchanged; （2） a user participates in several organizations at the same time, her secret key is only related with her identity. However, no previous schemes have these two properties.

关键词： signature identity-based society oriented signature

An Efficient identity-based Anonymous Signcryption Scheme

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Wuhan University Journal of Natural Sciences 2008年第6期13卷 670-674页

作者： YU Yong LI Fagen XU Chunxiang SUN Ying School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 Sichuan China

Signcryption is a cryptographic primitive that performs encryption and signature in a single logical step more efficiently than sign-then-encrypt approach. Till now, various kinds of signcryption schemes have been proposed. Among them, the requirement of signcrypter＇s privacy protection is needful in some practical applications. In this paper, a new identity-based anonymous signcryption scheme from hilinear pairings, which is the organic combination of identity-based ring signature and encryption scheme, is proposed. The proposed scheme is indistinguishable against the chosen ciphertext attack under the Decisional Bilinear Diffie-Hellman assumption in the random oracle model. Its unforgeability relies on the computational Diffieellman problem. Compared with the previous schemes, the new scheme is more efficient in computation.

关键词： identity-based ring signature anonynaous signcryption bilinear pairing

identity-based Steganography in Spatial Domain

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Journal of Computer and Communications 2018年第3期6卷 68-77页

作者： Xuba Xu Qiankai Nie College of Information Science and Technology Jinan University Guangzhou China

This paper proposed an identity-based steganographic scheme, where a receiver with certain authority can recover the secret message ready for him, but cannot detect the existence of other secret messages. The proposed scheme created several separate covert communication channels tagged by the Fuzzy identity-based Encryption (FIBE) in one grayscale image. Then each channel is used to embed one secret message by using any content-aware steganographic scheme. Receivers with different attributes can extract different messages corresponded. The Experiments illustrated the feasibility of this identity-based secret message extraction. Further, the proposed scheme presents high undetectability against steganalytic attack launched by receivers without corresponded attributes.

关键词： Steganography Multiple Embedding Fuzzy identity-based Encryption

A Provably Secure identity-based Authentication Multiple Key Agreement Protocol

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China Communications 2011年第2期8卷 26-33页

作者：谭作文 School of Information Technology Jiangxi University of Finance and Economics Key Lab of Network Security and Cryptology School of Mathematics and Computer ScienceFujian Normal University

An authentication multiple key agreement protocol allows the users to compute more than one session keys in an authentication way. In the paper,an identity-based authentication multiple key agreement protocol is proposed. Its authentication part is proven secure against existential forgery on adaptively chosen message and ID attacks under the random oracle model upon the CDH assumptions. The session keys are proven secure in a formal CK security model under the random oracle model upon the CBDH assumptions. Compared with the previous multiple key agreement protocols,it requires less communication cost.

关键词： authentication identity-based key agreement

An identity-based Scheme of Fair Exchange of Digital Signatures

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1761-1764页

作者： YU Yong YANG Bo YANG Guoqing State Key Laboratory of Integrated Service Networks Xidian University Xi＇an 710071 Shaanxi China College of Information South China Agricultural University Guangzhou 510649 Guangdong China

Fair exchange of digital signatures is an important tool for signing digital contracts, e-payment and other electronic commerce actions. An ID-based scheme of fair exchange of digital signature is proposed in this paper. The protocol relies on a trusted third party, but is ＂optimistic＂, in that the third party is only needed in cases where one player attempts to cheat or simply crashes. The proposed scheme has properties of short signature, low computation and verification cost. It can realize exchange of digital signatures fairly and effic, iently. A key feature of our scheme is that it is identity-based, which needs no certificates and has a simple key management. To our best knowledge, this is the first identity based scheme of fair exchange of digital signatures.

关键词： identity-based fair exchange digital signature

An Efficient identity-based Homomorphic Broadcast Encryption

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Journal of Computer and Communications 2019年第2期7卷 23-30页

作者： Mei Cai IT Department Jinan University Library Guangzhou China

Broadcast encryption (BE) allows a sender to broadcast its message to a set of receivers in a single ciphertext. However, in broadcast encryption scheme, ciphertext length is always related to the size of the receiver set. Thus, how to improve the communication of broadcast encryption is a big issue. In this paper, we proposed an identity-based homomorphic broadcast encryption scheme which supports an external entity to directly calculate ciphertexts and get a new ciphertext which is the corresponding result of the operation on plaintexts without decrypting them. The correctness and security proofs of our scheme were formally proved. Finally, we implemented our scheme in a simulation environment and the experiment results showed that our scheme is efficient for practical applications.

关键词： identity-based Broadcast Encryption Homomorphic Communication

CCA2 secure biometric identity based encryption with constant-size ciphertext

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第10期12卷 819-827页

作者： Yang YANG Yu-pu HU Le-you ZHANG Chun-hui SUN Department of Communication Engineering Xidian University Xi'an 710071 China Department of Mathematics and Computer Science Fuzhou University Fuzhou 350002 China Department of Mathematics Science Xidian University Xi'an 710071 China

We propose a new biometric identity based encryption scheme （Bio-IBE）, in which user biometric information is used to generate the public key with a fuzzy extractor. This is the first Bio-IBE scheme that achieves constant size ciphertext. This is also a scheme that is secure against the adaptive chosen ciphertext attack （CCA2）. Details are presented along with a discussion of Shamir＇s threshold secret sharing and fuzzy extraction of biometrics, which is based on error correction codes. We also define a security model and prove that the security of the proposed scheme is reduced to the decisional bilinear Diffie-Hellman proposed scheme has better efficiency and stronger security （DBDH） assumption. The comparison shows that the compared with the available Bio-IBE schemes.

关键词： Public key cryptography identity-based Data security Biometric Encryption