An Efficient and Practical Public Key Cryptosystem with CCA-Security on Standard Model  

作　　者：Zhen Liu Xiaoyuan Yang Weidong Zhong Yiliang Han 

机构地区：[1]Department of Network and Information Security Key Laboratory,Engineering University of the Armed PoliceForce

出　　处：《Tsinghua Science and Technology》2014年第5期486-495,共10页清华大学学报（自然科学版（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 61272492, 61103231, 61103230, 61402530, and 61202492);the Natural Science Foundation of Shaanxi Provience (Nos. 2013JM8012 and 2014JQ8301)

摘　　要：Chosen Ciphertext Attack （CCA） security on the standard model is widely accepted as the standard security notion for the public key cryptosystem. The existing CCA-secure public key cryptosystems on the standard model are expensive in terms of efficiency and practicality. In this paper, an efficient and practical public key cryptosystem is presented over the group of signed quadratic residues. It is provably secure against CCA on the standard model. Furthermore, public verifiability for this scheme is also realized in the way that projects the verification privacy key into public key on trapdoor pretending. It will be useful to devise efficient CCA-secure threshold and proxy re-encryption schemes on the standard model.Chosen Ciphertext Attack （CCA） security on the standard model is widely accepted as the standard security notion for the public key cryptosystem. The existing CCA-secure public key cryptosystems on the standard model are expensive in terms of efficiency and practicality. In this paper, an efficient and practical public key cryptosystem is presented over the group of signed quadratic residues. It is provably secure against CCA on the standard model. Furthermore, public verifiability for this scheme is also realized in the way that projects the verification privacy key into public key on trapdoor pretending. It will be useful to devise efficient CCA-secure threshold and proxy re-encryption schemes on the standard model.

关 键 词：public key cryptosystem standard model Chosen Ciphertext Attack （CCA）-security public verifiability 

分 类 号：TN918.4[电子电信—通信与信息系统]