A homomorphic encryption scheme with adaptive chosen ciphertext security but without random oracle

被引：6
|
作者：
Gong, Linming [1 ]
Li, Shundong [1 ]
Mao, Qing [1 ]
Wang, Daoshun [2 ]
Dou, Jiawei [3 ]
机构：
[1] Shaanxi Normal Univ, Sch Comp Sci, Xian 710062, Peoples R China
[2] Tsinghua Univ, Dept Comp Sci & Technol, Beijing 100084, Peoples R China
[3] Shaanxi Normal Univ, Sch Math & Informat Sci, Xian 710062, Peoples R China
来源：
THEORETICAL COMPUTER SCIENCE | 2016年 / 609卷
关键词：
Adaptive chosen ciphertext attack; Blocking CCA2; Decisional composite residuosity; Homomorphism; Shared base;
D O I：
10.1016/j.tcs.2015.10.001
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
In this study, we consider the problem of constructing a homomorphic encryption scheme that is secure against adaptive chosen ciphertext attack (CCA2). This type of scheme has many applications in secure multi-party computation, electronic voting, and cloud storage and computation. We present an encryption scheme, based on the composite degree residuosity classes, which can block CCA2 while maintaining homomorphism. Our cryptosystem, which is based on standard modular arithmetic, is provable with indistinguishable security under CCA2. An additional contribution of this study is a new definition of preventing CCA2 (or blocking CCA2). (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：253 / 261
页数：9
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