计算机技术与发展2018，Vol.28Issue(2)：119-124,6.DOI:10.3969/j.issn.1673-629X.2018.02.026
基于LSSS的隐藏策略属性基加密方案
An Attribute-based Encryption Scheme with Hidden Policy Based on LSSS
摘要
Abstract
In traditional ciphertext policy attribute-based encryption schemes,it will send ciphertext to the decryptor along with access policy during decryption phase,but sometimes the access policy itself contains sensitive information,which will also leak the user's privacy infor-mation.Therefore,for the problem of policy without hidden in CP-ABE schemes,we propose a new ciphertext policy attribute-based en-cryption with policy hidden based on existing CP-ABE schemes.It employs linear secret sharing schemes(LSSS) as access structure which has strong expression and can express any access policy.We adopt three primes composite order bilinear groups to construct the scheme and realize the policy hidden.Under dual system encryption technology,it could be proved chosen-plaintext attack (CPA) secure.Compared with the other schemes based LSSS with policy hidden,the proposed scheme not only reduces system overhead by decreasing the order of composite order bilinear groups,but also improves encryption efficiency by reducing the number of operations in the encryption phase and in-creases the feasibility in practical application.关键词
密文策略/属性基加密/线性秘密分享矩阵/策略隐藏/合数阶双线性群Key words
ciphertext policy/attribute-based encryption/linear secret sharing schemes/hidden policy/composite order bilinear groups分类
信息技术与安全科学引用本文复制引用
陈丹伟,汤波..基于LSSS的隐藏策略属性基加密方案[J].计算机技术与发展,2018,28(2):119-124,6.基金项目
国家242信息安全计划(2015A051,2012A138) （2015A051,2012A138）
国家十一五科技支撑计划课题(2007BAK34B06) （2007BAK34B06）
十五科技攻关计划课题(2004BA811B04) （2004BA811B04）
