| 摘要: |
| 无证书混合签密能够处理无证书体制下任意长度的消息,而普通的无证书签密则不能处理.指出Selvi 提出的攻击是不成立的,并构造了一个新的无证书混合签密方案.与现有方案相比,该方案具有密文长度短、计度快的优点,因此更适用于带宽窄、计算资源少的通信环境,如ad hoc 网络.在随机预言模型和双线性Diffie-Hellman 困难性假设条件下,该方案可证明是安全的. |
| 关键词: 无证书混合签密 无证书签密密钥封装机制 数据封装机制 可认证性 机密性 双线性Diffie-Hellman 随机
预言模型 |
| DOI：10.3724/SP.J.1001.2011.03825 |
| 分类号: |
| 基金项目:国家自然科学基金(60772136); 国家高技术研究发展计划(863)(2007AA01Z435); 国家科技支撑计划
(2008BAH22B03, 2007BAH08B01); 国家“111”项目(B08038) |
|
| Efficient Certificateless Hybrid Signcryption |
|
SUN Yin-Xia, LI Hui
|
|
Key Laboratory of Computer Networks and Information Security of Ministry of Education, Xidian University, Xi'an 710071, China
|
| Abstract: |
| Certificateless hybrid signcryption can handle messages of arbitrary length while the conventional
certificateless signcryption cannot. This paper demonstrates that the attacks presented by Selvi, et al., do not hold,
and proposes a new certificateless hybrid signcryption scheme, which outperforms all the existing schemes on both
bandwidth usage and computation efficiency. Hence, this scheme is more suitable for the applications with a narrow
bandwidth and limited computation resources such as ad hoc networks. This scheme has been proven to be secure in
the random oracle model, under the bilinear Diffie-Hellman assumption. |
| Key words: certificateless hybrid signcryption certificateless signcryption key encapsulation mechanism DEM
(data encapsulation mechanism) authenticity confid- entiality bilinear Diffie-Hellman random
oracle model |
