Cryptanalysis and improvement of a certificateless encryption scheme in the standard model |
| |
Authors: | Lin Cheng Qiaoyan Wen Zhengping Jin Hua Zhang |
| |
Affiliation: | State Key Laboratory of Networking and Switch Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China |
| |
Abstract: | Certificateless public key cryptography eliminates inherent key escrow problem in identity-based cryptography, and does not yet requires certificates as in the traditional public key infrastructure. In this paper, we give crypt-analysis to Hwang et al.’s certificateless encryption scheme which is the first concrete certificateless encryption scheme that can be proved to be secure against “malicious-but-passive” key generation center (KGC) attack in the standard model. Their scheme is proved to be insecure even in a weaker security model called “honest-but-curious” KGC attack model. We then propose an improved scheme which is really secure against “malicious-but-passive” KGC attack in the standard model. |
| |
Keywords: | standard model provable security certificateless public key cryptography |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《Frontiers of Computer Science》浏览原始摘要信息 |
|
点击此处可从《Frontiers of Computer Science》下载全文 |