代理签密体制研究综述

Survey of proxy signcryption

代理签密是实际应用中不可缺少的数字签密技术。首先,阐述代理签密的原理和安全特性;然后,根据公钥认证的方法,将代理签密归类为基于PKI的代理签密体制、基于身份的签密体制和无证书代理签密体制,重点论述基于身份的代理签名体制和无证书代理签名体制的研究现状。最后,指出代理签名方案作为一种新的数字签名技术,具有重要的应用前景;将来的研究方向应重点放在如何提高方案的效率,如何设计出更多无证书特殊类型的代理签密方案,以及如何将方案更好地和实际运用相结合等方面。

Proxy signcryption is one of the important digital signeryption techniques. Firstly, the principles and the character- istics of security of the proxy signcryption were elaborated. Then, according to the method of public key authentication, the authors classified the proxy signcryption as PKI basing proxy signcryption, identity basing signcryption scheme and certifi- cateless proxy signcryption scheme, and focused on the current research of identity basing proxy signature scheme and a eer- tificateless proxy signature system. Finally ,we pointed out that the proxy signature scheme, as a new kind of digital signature technology, has important application prospect, and the research direction in the future would be how to improve the efficiency of the scheme,how to design more eertificateless proxy signeryption scheme and how to combine the cheme with application.