| efficient unidirectional proxy re-encryption | |
| Chow Sherman S. M.; Weng Jian; Yang Yanjiang; Deng Robert H. | |
| 2010 | |
| 会议名称 | 3rd International Conference on Cryptology in Africa, AFRICACRYPT 2010 |
| 会议录名称 | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
| 页码 | 316-332 |
| 会议日期 | May 3, 201 |
| 会议地点 | Stellenbosch, South africa |
| 收录类别 | ei |
| 出版地 | Germany |
| ISSN | 3029743 |
| ISBN | 3642126774 |
| 部门归属 | (1) Department of Computer Science, Courant Institute of Mathematical Sciences, New York University, NY, United States; (2) Department of Computer Science, Jinan University, Guangzhou, China; (3) School of Information Systems, Singapore Management University, Singapore, Singapore; (4) State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing, China; (5) Institute for Infocomm Research, Singapore, Singapore |
| 摘要 | Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into one encrypting the same plaintext for Bob. The proxy only needs a re-encryption key given by Alice, and cannot learn anything about the plaintext encrypted. This adds flexibility in various applications, such as confidential email, digital right management and distributed storage. In this paper, we study unidirectional PRE, which the re-encryption key only enables delegation in one direction but not the opposite. In PKC 2009, Shao and Cao proposed a unidirectional PRE assuming the random oracle. However, we show that it is vulnerable to chosen-ciphertext attack (CCA). We then propose an efficient unidirectional PRE scheme (without resorting to pairings). We gain high efficiency and CCA-security using the "token-controlled encryption" technique, under the computational Diffie-Hellman assumption, in the random oracle model and a relaxed but reasonable definition. © 2010 Springer-Verlag. |
| 关键词 | Network Security |
| 语种 | 英语 |
| 内容类型 | 会议论文 |
| URI标识 | http://ir.iscas.ac.cn/handle/311060/8744 |
| 专题 | 2010软件所会议论文 |
| 推荐引用方式 GB/T 7714 | Chow Sherman S. M.,Weng Jian,Yang Yanjiang,et al. efficient unidirectional proxy re-encryption[C]. Germany,2010:316-332. |
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