Abstract
At Eurocrypt 2005, Boneh-Boyen-Goh presented an interesting and important construction of a constant size ciphertext HIBE. The HIBE was proven to be secure in the selective-ID model. In this paper, we present two variants of the BBG-HIBE secure in more general security models. The first variant is proved to be secure in a generalization of the selective-ID model while the second variant is proved to be secure in the full security model. Our constructions are not straightforward modifications of the BBG-HIBE. Several techniques have to be suitably combined to obtain the required proofs. © Springer-Verlag Berlin Heidelberg 2006.
Cite
CITATION STYLE
Chatterjee, S., & Sarkar, P. (2006). New constructions of constant size ciphertext HIBE without random oracle. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 4296 LNCS, pp. 310–327). Springer Verlag. https://doi.org/10.1007/11927587_26
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