Secure Certificateless Encryption with Short Ciphertext  

作　　者：SUN Yinxia ZHANG Futai 

机构地区：[1]School of Mathematics and Computer Science, Nanjing Normal University, Nanjing 210097, China [2]Key Lab of Computer Networks and Information Security, Ministry of Education, Xidian University, Xi＇an 710071, China

出　　处：《Chinese Journal of Electronics》2010年第2期313-318,共6页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.60673070） and the Natural Science Foundation of Jiangsu Province （No.BK2006217）.

摘　　要：Certificateless public key cryptography was introduced to solve the key escrow problem in identity based cryptography while enjoying the most attractive certificateless property. In this paper, we present a secure Certificateless encryption （CLE） scheme with short ciphertext. The clphertext length is at least ｜m｜-bit （the length of a plaintext） shorter than the existing CLE schemes while retaining similar efficiency of computation. The new scheme is provably secure against adaptive chosen ciphertext attacks in the random oracle model.

关 键 词：Certificateless encryption Short ciphertext Bilinear pairing Random oracle Gap-BDH problem Twinning technique. 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术] TP309[自动化与计算机技术—计算机科学与技术]