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New technique for chosen-ciphertext security based on non-interactive zero-knowledge

Authors
Seo, MinhyeAbdalla, MichelLee, Dong HoonPark, Jong Hwan
Issue Date
7월-2019
Publisher
ELSEVIER SCIENCE INC
Keywords
Chosen-ciphertext security; NIZK; Random oracle model
Citation
INFORMATION SCIENCES, v.490, pp.18 - 35
Indexed
SCIE
SCOPUS
Journal Title
INFORMATION SCIENCES
Volume
490
Start Page
18
End Page
35
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/64219
DOI
10.1016/j.ins.2019.03.063
ISSN
0020-0255
Abstract
In this study, we propose a new method for conversion from a one-way (OW)-secure key encapsulation mechanism (KEM) into a chosen-ciphertext (CCA) secure KEM in the random oracle model. Our conversion method is based on the non-interactive zero-knowledge (NIZK) proof system for proving the relationships (e.g., equality or linearity) of discrete logarithms, where the security analysis of our conversion method depends on the NIZK properties of soundness and zero-knowledge. Our conversion method achieves tight security reduction and it is semi-generic in the sense that other than OW-security, a KEM should be NIZK-compatible. From a theoretical viewpoint, our conversion method can be considered as the corresponding approach for obtaining an efficient signature by applying the Fiat-Shamir transform to the NIZK system. We applied our conversion method to several OW-secure (identity-based) KEMs and compared the results with those obtained by previous methods for achieving CCA security. (C) 2019 Elsevier Inc. All rights reserved.
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