From Selective to Full Security: Semi-Generic Transformations in the Standard Model

Abstract : In this paper, we propose an efficient, standard model, semigeneric transformation of selective-secure (Hierarchical) Identity-Based Encryption schemes into fully secure ones. The main step is a procedure that uses admissible hash functions (whose existence is implied by collision-resistant hash functions) to convert any selective-secure wildcarded identity-based encryption (WIBE) scheme into a fully secure (H)IBE scheme. Since building a selective-secureWIBE, especially with a selective-secure HIBE already in hand, is usually much less involved than directly building a fully secure HIBE, this transform already significantly simplifies the latter task. This black-box transformation easily extends to schemes secure in the Continual Memory Leakage (CML) model of Brakerski et al. (FOCS 2010), which allows us obtain a new fully secure IBE in that model. We furthermore show that if a selective-secure HIBE scheme satisfies a particular security notion, then it can be generically transformed into a selective-secure WIBE. We demonstrate that several current schemes already fit this new definition, while some others that do not obviously satisfy it can still be easily modified into a selective-secure WIBE.
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Communication dans un congrès
Marc Fischlin and Johannes Buchmann and Mark Manulis. PKC 2012, May 2012, Darmstadt, Germany. Springer, 7293, pp.316-333, 2012, Lecture Notes in Computer Science. 〈10.1007/978-3-642-30057-8_19〉
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https://hal.inria.fr/hal-00915817
Contributeur : Michel Abdalla <>
Soumis le : lundi 9 décembre 2013 - 13:21:09
Dernière modification le : jeudi 11 janvier 2018 - 06:22:10

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Michel Abdalla, Dario Fiore, Vadim Lyubashevsky. From Selective to Full Security: Semi-Generic Transformations in the Standard Model. Marc Fischlin and Johannes Buchmann and Mark Manulis. PKC 2012, May 2012, Darmstadt, Germany. Springer, 7293, pp.316-333, 2012, Lecture Notes in Computer Science. 〈10.1007/978-3-642-30057-8_19〉. 〈hal-00915817〉

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