NDLI: Fixing the Sender-Equivocable Encryption Scheme in Eurocrypt 2010

Content Provider	IEEE Xplore Digital Library
Author	Zhengan Huang Shengli Liu Baodong Qin Kefei Chen
Copyright Year	2013
Description	Author affiliation: Sch. of Sci., Hangzhou Normal Univ., Hangzhou, China (Kefei Chen) \|\| Dept. of Comput. Sci. & Eng., Shanghai Jiao Tong Univ., Shanghai, China (Zhengan Huang; Shengli Liu; Baodong Qin)
Abstract	There are two main approaches to achieve selective opening chosen-cipher text security (SO-CCA security): lossy encryption (including all-but-many lossy trapdoor functions) and sender-equivocable encryption. The second approach was proposed in Eurocrypt 2010 by Fehr et al., who proved that sender equivocability under chosen-cipher text attacks (NC-CCA security) implies SO-CCA security. They also proposed a new primitive called ``cross-authentication code'', and used it to construct a public-key encryption (PKE) scheme (the FHKW scheme) achieving NC-CCA security. However, recently in PKC 2013, Huang et al. pointed out that the properties of cross-authentication code cannot guarantee the NC-CCA security of the FHKW scheme, i.e., the security proof of the FHKW scheme is flawed. In this paper, we propose the notion of ``strong cross-authentication code'', which helps to fix the security proof of the FHKW scheme. This strong notion captures the ability of a cross-authentication code to efficiently generate a new key, based on all the other keys and the cross-authentication tag, such that the new key is statistically indistinguishable from the original key. With this code as a building block, we construct a new version of the FHKW scheme, and prove it to be NC-CCA secure for multi-bit plaintexts. Our work makes possible the instantiation of simulation-based SO-CCA secure PKE with a multi-bit message space from NC-CCA secure PKEs.
Sponsorship	IEEE Syst. Man Cybern.
Starting Page	366
Ending Page	372
File Size	218500
Page Count	7
File Format	PDF
ISBN	9780769549880
DOI	10.1109/INCoS.2013.69
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-09
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sender-equivocable encryption Strong cross-authentication code Public key Authentication Selective opening chosen-ciphertext security Games Educational institutions Encryption
Content Type	Text
Resource Type	Article

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