Pairing-Free Certificateless Key-Insulated Encryption with Provable Security  

作　　者：Li-Bo He Dong-Jie Yan Hu Xiong Zhi-Guang Qin 

机构地区：[1]School of Information and Software Engineering,University of Electronic Science and Technology of China,Chengdu 610054

出　　处：《Journal of Electronic Science and Technology》2018年第1期50-56,共7页电子科技学刊（英文版）

基　　金：in part by the National Natural Science Foundation of China under Grants No.61003230,No.61370026,No.61300191,and No.61202445

摘　　要：Certificateless encryption attracts a lot of attention so far by eliminating the key escrow problem in identity-based encryption and public key certificates in the traditional public key cryptography. By considering the threat from the key exposure, it is desirable to incorporate the idea of key-insulated cryptosystem into the certificateless encryption. In this paper, we have designed an efficient certificateless keyinsulated encryption(CL-KIE) scheme to achieve this goal. By our approach, the computational performance of our scheme has been improved significantly in terms of reduction on running time and storage. We also gave the security proof of the new CL-KIE scheme against the chosen plaintext attacks(CPAs) in the random oracle, considering the assumption of the computational Diffie-Hellman(CDH) problem.Certificateless encryption attracts a lot of attention so far by eliminating the key escrow problem in identity-based encryption and public key certificates in the traditional public key cryptography. By considering the threat from the key exposure, it is desirable to incorporate the idea of key-insulated cryptosystem into the certificateless encryption. In this paper, we have designed an efficient certificateless keyinsulated encryption(CL-KIE) scheme to achieve this goal. By our approach, the computational performance of our scheme has been improved significantly in terms of reduction on running time and storage. We also gave the security proof of the new CL-KIE scheme against the chosen plaintext attacks(CPAs) in the random oracle, considering the assumption of the computational Diffie-Hellman(CDH) problem.

关 键 词：Certificateless cryptography keyinsulated pairing-free random oracle 

分 类 号：TN01[电子电信—物理电子学]