An Identity-Based Group-Oriented Threshold Encryption Scheme
In many broadcast systems, it is useful to send messages to some (not all) members of the whole group. And the ciphertext can only be decrypted with the participation of a certain number of receivers. In this paper, we construct an efficient identity-based group-oriented threshold encryption scheme. The sender can encrypt a single message for a dynamic k-member group which can be a subset of the n-member group. And at least t receivers are needed to decrypt the ciphertext, where 1≤t≤k≤n. Meanwhile, we provide the formal security proofs of this scheme in random oracle model.
broadcast encryption identity-based threshold group-oriented
Jinghao Xing Qiuliang Xu
School of Computer Science and TechnologyShandong UniversityJinan China School of Computer Science and Technology Shandong University Jinan China
国际会议
厦门
英文
30-33
2011-06-24（万方平台首次上网日期，不代表论文的发表时间）