针对带关键字检索的公钥加密体制中多关键字间的关系,分析了Joonsang Baek方案在安全性和可用性方面的缺陷,结合拉格朗日插值多项式,提出一种多关键字检索的公钥加密方案。该方案实现了从大量加密数据中选出部分数据进行优先处理,且方案只生成一个陷门信息,效率得到了提升。
In view of the relationship between multiple keywords in public key encryption with keyword search,this paper analyzed the defects of Joonsang Baek's scheme in security and usability.And proposed a sort of public key encryption with multiple keywords search,making use of the Lagrange polynomial interpolation.This scheme not only gave some datas choosed from the mass encrypted datas priority in disposing,but also produced only one tarpdoor,improving the efficiency.