自我强化的基于身份的广播加密方案

为了有效解决广播加密系统中的密钥泄漏和密钥管理的问题，提出了一个新的实用的基于身份的广播加密方案。利用超椭圆曲线上的双线性对构造广播加密和解密算法，节省了广播通信传输带宽。引入了密钥自我强化保护机制，在分配用户密钥时通过用户的机密信息计算其解密密钥，降低了用户为保护自己的利益而泄漏其密钥的可能性。证明了方案在扩展的k元BDHI假设下对抗k用户合谋攻击的安全性

Self-enforcing ID based Broadcast Encryption Scheme

To efficiently solve the private key leak and management problems in broadcast encryption systems,a new efficient practical ID-based broadcast encryption scheme was presented.The bilinear paring on a super-elliptic curve was used to construct the broadcast encryption and decryption algorithms,which greatly saves the broadcasting communication transmission bandwidth.In the key distribution process,self-enforcing protection strategy was introduced by computing one user's decryption key through his secret information,which reduces the risk for one user of leaking his private keys.Security proof against k-collusion attack under the difficulty of extended k-BDHI assumption was given.