一个无证书的代理重加密方案设计

摘要

在不可信的分布式网络环境中，代理重加密是保障用户数据的安全性和可共享性的方法之一。基于Al-Riyima等人的无证书加密方案，提出了一个安全的无证书代理重加密方案。该方案不仅具有传统代理重加密方案的核心功能，而且还避免了基于身份的代理重加密方案所带来的密钥托管问题。%Proxy re -encryption ( PRE ) scheme is one of the promising methods to ensure the security and sharing of the users'data in untrusted distributed network environment .Based on Ibraimi et al's certificateless public key crytography ,a secure certificateless proxy re -encryption scheme is proposed .It not only keeps the traditional functions of proxy re -encryption,but also solves the key escrow problems in identity -based prox-y re-encryption scheme.