标准模型下的密钥隔离代理签名方案

摘要

Key-exposure seems inevitable in proxy signature scheme. To minimize the damage caused by key exposure in proxy signature scheme, key-insulated mechanism to proxy signature scheme was introduced. However, existing key-insulated proxy sig-nature schemes are based on identity. In this paper, we present a key-insulated proxy signature scheme in the standard model. The scheme is key-insulated security and unforgeability of the proxy signature.%代理签名方案中的密钥泄露问题在所难免。为了减轻代理签名方案中的密钥泄露带来的危害，将密钥隔离机制引入代理签名方案。现有的密钥隔离代理签名方案都是基于身份的。本文提出标准模型下的密钥隔离代理签名方案，并在安全模型中证明密钥隔离安全性和代理签名的不可伪造性。