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Communication dans un congrès
(Hierarchical) Identity-Based Encryption from Affine Message Authentication
Abstract : We provide a generic transformation from any affine message authentication code (MAC) to an identity-based encryption (IBE) scheme over pairing groups of prime order. If the MAC satisfies a security notion related to unforgeability against chosen-message attacks and, for example, the k-Linear assumption holds, then the resulting IBE scheme is adaptively secure. Our security reduction is tightness preserving, i.e., if the MAC has a tight security reduction so has the IBE scheme. Furthermore , the transformation also extends to hierarchical identity-based encryption (HIBE). We also show how to construct affine MACs with a tight security reduction to standard assumptions. This, among other things, provides the first tightly secure HIBE in the standard model.
Littérature citée [30 références]
https://hal-unilim.archives-ouvertes.fr/hal-01239920
Contributeur : Olivier Blazy <>
Soumis le : mercredi 23 mars 2016 - 17:00:18
Dernière modification le : vendredi 25 mars 2016 - 01:01:31
Document(s) archivé(s) le : lundi 14 novembre 2016 - 03:03:13
Contributeur : Olivier Blazy <>
Soumis le : mercredi 23 mars 2016 - 17:00:18
Dernière modification le : vendredi 25 mars 2016 - 01:01:31
Document(s) archivé(s) le : lundi 14 novembre 2016 - 03:03:13
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