Leakage-resilient attribute based encryption in prime-order groups via predicate encodings |
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Authors: | Jie Zhang Jie Chen Junqing Gong Aijun Ge Chuangui Ma |
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Institution: | 1.State Key Laboratory of Mathematical Engineering and Advanced Computing,Zhengzhou,China;2.East China Normal University,Shanghai,China;3.ENS de Lyon, Laboratoire LIP (U. Lyon, CNRS, ENSL, INRIA, UCBL),Lyon,France;4.Department of Computer Science and Engineering,Shanghai Jiao Tong University,Shanghai,China;5.Army Aviation Institute,Beijing,China |
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Abstract: | Recently, leakage-resilient cryptography has become a hot research topic. It seeks to build more robust models of adversarial access to cryptographic algorithms. The main goal is to design a scheme that remains secure even when arbitrary, yet bounded, information about secret key is leaked. In this paper, we present a modular framework for designing leakage-resilient attribute-based encryption (ABE) schemes based on extended predicate encoding. We first extend the predicate encoding to the leakage-resilient predicate encoding; and then, design several leakage-resilient predicate encodings, and finally give a generic construction of leakage-resilient ABE based on the newly proposed encodings. Moreover, we can instantiate our framework in prime order bilinear groups to obtain concrete constructions, and prove their full security under the standard k-Lin assumption in the continual memory leakage model. |
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