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Title:
Simple, Efficient and Strongly KI-Secure Hierarchical Key Assignment Schemes
Authors: Eduarda S. V. Freire, Kenneth G. Paterson, Bertram Poettering
Abstract:Hierarchical Key Assignment Schemes can be used to enforce access control policies by cryptographic means. In this paper, we present a new, enhanced security model for such schemes. We also give simple, efficient, and strongly-secure constructions for Hierarchical Key Assignment Schemes for arbitrary hierarchies using pseudorandom functions and forward-secure pseudorandom generators. We compare instantiations of our constructions with state-of-the-art Hierarchical Key Assignment Schemes, demonstrating that our new schemes possess an attractive trade-off between storage requirements and efficiency of key derivation.
ePrint: https://eprint.iacr.org/2012/645
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