摘要
针对已提出的断言加密方案计算成本太高的问题，在合数阶双线性映射上提出了一个高效的断言加密方案。该方案中断言向量和属性向量的每1个分量只需1个双线性群元素，解密运算中每个属性分量只需1个对运算，比已有典型方案的效率提高了近一倍。在标准模型下，采用对偶法证明方案是适应性安全的。
Several recent works on predicate encryption all needed high cost. An efficient predicate encryption based on composite order bilinear groups is proposed, which is adap- tively secure against chosen-plaintext attacks in the standard model by adopting the dual sys- tem encryption methodology. The cost of our scheme is nearly half of the existed scheme. There is only one group element for each attribute in the ciphertext and only one pairing op- eration for each attribute in the decryption algorithm.
作者
吴立强
WU Liqiang(Department of Electronic Teehndogy ,Engineering University of PAP, Xi＇an 710086,China)
出处
《武警工程大学学报》
2017年第2期51-54,共4页
Journal of Engineering University of the Chinese People＇s Armed Police Force
基金
武警工程大学基础研究项目“基于格的身份型加密体制研究”（WJY201422）
关键词
断言加密
适应性安全
对偶法
predicate encryption
adaptive security
dual system encryption
