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Title: Efficient generic construction of CCA-secure identity-based encryption from randomness extraction
Authors: Baek, J
Wong, DS
Li, J
Au, MH 
Keywords: Chosen ciphertext attack
Generic construction
Identity-based encryption
Randomness extraction
Issue Date: 2016
Publisher: Oxford University Press
Source: Computer journal, 2016, v. 59, no. 4, p. 508-521 How to cite?
Journal: Computer journal 
Abstract: We propose a generic construction that yields efficient identity-based encryption (IBE) schemes secure against chosen ciphertext attack (CCA) in the standard model. Our construction extends Kiltz et al.'s (Eurocrypt '09) method of constructing CCA-secure public-key encryption schemes via randomness extraction to the identity-based setting. The main idea of our construction is to transform 'ϵ1-almost κ-entropic' and valid/invalid ciphertext indistinguishable (VI-IND) identity-based hash proof system to the one that satisfies the stronger 'ϵ2-universal' and VI-IND property. This transformation is realized by a randomness extractor based on the 4-wise hash function.We demonstrate that our generic construction can produce CCA-secure IBE schemes whose efficiency is comparable with the most efficient but non-generic CCA-secure IBE schemes without random oracles in the literature.
ISSN: 0010-4620 (print)
1460-2067 (online)
DOI: 10.1093/comjnl/bxv070
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