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double-authentication-preventing signatures revisited:new definition and construction from chameleon hash

Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 176-186页

作者： Fei LI Wei GAO Gui-lin WANG Ke-fei CHEN Chun-ming TANG School of Mathematics and Statistics Ludong University Key Laboratory of Information Security Guangzhou University China-USA Computer Science Research Center Nanjing University of Information Science and Technology Shield Lab Singapore Research Center of Huawei Department of Mathematics Hangzhou Normal University

double-authentication-preventing signature(DAPS) is a novel signature notion proposed at ESORICS2014. The double-authentication-preventing property means that any pair of signatures on two different messages with the same subject will result in an immediate collapse of the signature system. A few potential applications of DAPS have been discussed by its inventors, such as providing a kind of self-enforcement to discourage certificate authority(CA) from misbehaving in public key infrastructure and offering CA some cryptographic arguments to resist legal coercion. In this study, we focus on some fundamental issues on DAPS. We propose a new definition,which is slightly weakened but still reasonable and strong enough to capture the DAPS concept. We develop the new notion of invertible chameleon hash functions with key exposure. Then we propose a generic DAPS scheme, which is provably secure if the underlying invertible chameleon hash function with key exposure is secure. We instantiate this general construction to obtain the DAPS schemes respectively based on the well-known assumptions of integer factorization, Rivest-Shamir-Adleman(RSA), and computational Diffie-Hellman(CDH). They are more efficient than previous DAPS schemes. Furthermore, unlike previous constructions, the trusted setup condition is not needed by our DAPS schemes based on RSA and CDH.

关键词： double-authentication-preventing signatures Chameleon hash function Digital signature Provable security Authority trust level

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Lattice-Based double-authentication-preventing Ring Signature for Security and Privacy in Vehicular Ad-Hoc Networks

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Tsinghua Science and Technology 2019年第5期24卷 575-584页

作者： Jinhui Liu Yong Yu Jianwei Jia Shijia Wang Peiru Fan Houzhen Wang Huanguo Zhang School of Computer Science Shaanxi Normal University. Xi'an 710119 China Department of Statistics and Actuarial Science Simon Fraser University Burnaby. V5A1S6 Canada School of Cyber Science and Engineering. Wuhan University Wuhan 430072China

Amidst the rapid development of the Internet of Things (loT), Vehicular Ad-Hoc NETwork (VANET), a typical loT application, are bringing an ever-larger number of intelligent and convenient services to the daily lives of individuals. However, there remain challenges for VANETs in preserving privacy and security. In this paper, we propose the first lattice-based double-authentication-preventing Ring Signature (DAPRS) and adopt it to propose a novel privacy-preserving authentication scheme for VANETs, offering the potential for security against quantum computers. The new construction is proven secure against chosen message attacks. Our scheme is more efficient than other ring signature in terms of the time cost of the message signing phase and verification phase, and also in terms of signature length. Analyses of security and efficiency demonstrate that our proposed scheme is provably secure and efficient in the application.

关键词： Vehicular Ad-Hoc NETwork(VANET) privacy security double-authentication-preventing Ring Signature(DAPRS) lattice

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