A New ID-based Multi-Recipient Public-key Encryption Scheme  

作　　者：PANG Liaojun GAO Lu PEI Qingqi GUI Jingjing WANG Yumin 

机构地区：[1]School of Life Sciences and Technology, Xidian University, Xi'an 710071, China [2]State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China

出　　处：《Chinese Journal of Electronics》2013年第1期89-92,共4页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.60803151, No.61103178）.

摘　　要：Multi-recipient public-key encryption can be used to solve the security issue of One-To-Many com-munications such as secure broadcast. In a multi-recipient public-key encryption scheme, a ciphertext generated by the sender with its private key can be decrypted correctly by each recipient with its own private key. To solve the key negotiation problem between the sender and each re-cipient, the ID-based multi-recipient encryption has been proposed recently. Baeket al. proposed a general method to design an ID-based multi-recipient public-key encryp-tion scheme with the IND-CCA2 security by using RE- ACT, and at the same time, they proposed an excellent scheme. However, analyses show that there are still some flaws in their scheme, such as exposing recipient identity and unfair encryption. Motivated by these concerns, we propose a new ID-based multi-recipient public-key encryp-tion scheme based on the same design method. Analyses show that our proposal can overcome all the flaws in Baek et al.＇s scheme and is more practical in applications.

关 键 词：Multi-recipient public-key encryption Secure broadcasts ID-based public-key cryptosystem. 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术] TN943.3[自动化与计算机技术—计算机科学与技术]