Results 21 to 30 of about 5,642 (158)
Weakened Random Oracle Models with Target Prefix [PDF]
, 2019 Weakened random oracle models (WROMs) are variants of the random oracle model (ROM). The WROMs have the random oracle and the additional oracle which breaks some property of a hash function. Analyzing the security of cryptographic schemes in WROMs, we can specify the property of a hash function on which the security of cryptographic schemes depends ...
Tezuka, Masayuki +2 more
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Attacks on One Designated Verifier Proxy Signature Scheme
Journal of Applied Mathematics, 2012 In a designated verifier proxy signature scheme, there are three participants, namely, the original signer, the proxy signer, and the designated verifier.
Baoyuan Kang
doaj +1 more source
How Risky Is the Random-Oracle Model? [PDF]
, 2009 RSA-FDH and many other schemes secure in the Random-Oracle Model (ROM) require a hash function with output size larger than standard sizes. We show that the random-oracle instantiations proposed in the literature for such cases are weaker than a random oracle, including the proposals by Bellare and Rogaway from 1993 and 1996, and the ones implicit in ...
Gaëtan Leurent, Phong Q. Nguyen
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Leveled Certificateless Fully Homomorphic Encryption Schemes From Learning With Errors
IEEE Access, 2020 Fully homomorphic encryption (FHE) is a form of public-key encryption that allows the computation of arbitrary functions on encrypted data without decrypting the data. As a result, it is a useful tool with numerous applications.
Mingxiang Li
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A New Certificateless Aggregate Signature Scheme [PDF]
Jisuanji gongcheng, 2017 On the basis of the certificateless short signature,this paper proposes a certificateless aggregate signature scheme in resource constrained environment.A signature protocol is initiated by the specified aggregator.The state information including random ...
CAO Suzhen,DAI Wenjie,SUN Han,WANG Xiuya
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A Secure User Authentication Protocol for Heterogeneous Mobile Environments
IEEE Access, 2022 Mobile devices have become very important for our daily needs. The user authentication protocols with the key agreement are required to deal with the security issues that arise from the use of mobile devices through Internet applications.
Alzubair Hassan +7 more
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Certificateless signature scheme without random oracles
Tongxin xuebao, 2015 The security of certificateless signature schemes can be proved under the random oracle model.However，any implementation of the random oracle may result in insecure schemes.Some certificateless signature schemes without random oracles are not secure ...
Yan-qiong LI, Ji-guo LI, Yi-chen ZHANG
doaj +2 more sources
Oracle inequalities for weighted group lasso in high-dimensional misspecified Cox models
Journal of Inequalities and Applications, 2020 We study the nonasymptotic properties of a general norm penalized estimator, which include Lasso, weighted Lasso, and group Lasso as special cases, for sparse high-dimensional misspecified Cox models with time-dependent covariates.
Yijun Xiao +3 more
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A Private Quantum Bit String Commitment
Entropy, 2020 We propose an entanglement-based quantum bit string commitment protocol whose composability is proven in the random oracle model. This protocol has the additional property of preserving the privacy of the committed message.
Mariana Gama, Paulo Mateus, André Souto
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Universally Composable Oblivious Transfer with Low Communication
Applied Sciences, 2023 In this paper, a universally composable 1-out-of-N oblivious transfer protocol with low communication is built. This protocol obtained full simulation security based on the modulo learning with rounding (Mod-LWR) assumption.
Jiashuo Song +5 more
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