基于椭圆曲线的自认证多代理签密方案

Self-certified multi-proxy signcryption scheme based on elliptic curves

在椭圆曲线离散对数问题的难解性下,结合多代理签名和自认证签密的特点,提出了一种基于椭圆曲线的自认证多代理签密方案.新方案不仅具有密钥短、速度快、安全性高等优点,而且克服了基于证书的公钥体系下由于公钥证书的存在而带来的一系列开销问题,同时完全阻止了权威机构伪造多代理签密.

Under the hardness of elliptic curve discrete logarithm problem,a new self-certified multi-proxy signcryption scheme based on elliptic curves is proposed by combining the thoughts of multi-proxy signature and self-certified signcryption.The scheme has the merits of short key,quick speed and good security.Moreover,the scheme can eliminate the spending problem of certificate-based cryptography,at the same time,it can prevent the system authority from forging multi-proxy signcryption.