【摘要】 在已有无证书签密的基础上,将tag-KEM(tag-key encapsulation mechanism)技术引入到无证书公钥密码体制中,实现了一种无证书的tag-KEM签密方案,与DEM相结合,可构成无证书的混合签密方案,并在随机预言模型下证明了该混合签密方案是安全的。该方案的对运算比Li Fa-gen的无证书混合签密方案的对运算少一次,效率更高。更多还原

【Abstract】 This paper investigated the possibility of constructing certificateless signcryption schemes using tag-KEM techniques in the certificateless signcryption setting.It could build certificateless hybrid signcryption scheme by combing with DEM.Under the random oracle model,the hybrid signcryption scheme was proved to be secure.The pairings are less a time than that of Li Fa-gen’s certificateless hybrid signcryption scheme,and the efficiency is higher.更多还原