基于身份多接收者签密双线性对方案

基于身份的多接收者签密是基于身份的签密扩展,它以保密且认证的方式传送某一消息给多个接收者.给出基于身份的多接收者签密的定义与安全模型,利用双线性对构造一个新的基于身份的多接收者签密方案.在随机预言机模型下,利用该方案可抗适应性选择密文与身份攻击,且方案满足不可伪造性、前向安全性和公开可验证性.签密涉及多个接收者时,计算成本低,且效率高.

An efficient identity-based multi-recipient signcryption scheme

Identity-based multi-recipient signcryption (ID-MRSC) is an extension of identity-based signcryption.It enables a user to broadcast a message to multiple receivers in a confidential and authenticated way.The definition and the security model of ID-MRSC was presented. The ID-MRSC scheme was secure against adaptively chosen ciphertext and identity attack in the random oracle model.The ID-MRSC scheme meets the requirements of signature unforgeability,forward security and public verifiability.Furthermore,it is significantly more efficient than currently available identity-based signcryption schemes,which have to re-signcrypt and re-send a message multiple times when involving multiple recipients with respect to computational costs and communication overheads.