基于属性基加密的云存储数据安全删重算法  

Secure De-duplication Algorithm for Cloud Storage Data Based on Attribute-Based Encryption

作　　者：刘啸[1] 刘玉龙[1] LIU Xiao;LIU Yu-long(School of Computer Science and Technology,School of Wisdom Education,Jiangsu Normal University,Xuzhou Jiangsu 221116,China)

机构地区：[1]江苏师范大学计算机科学与技术学院,江苏徐州221116

出　　处：《计算机仿真》2022年第11期487-490,共4页Computer Simulation

摘　　要：现有的云存储数据删重算法无法加密云数据属性基,导致数据删重的时间开销较大,受数据量影响较大,难以广泛应用。研究提出基于属性基加密的云存储数据安全删重算法。采用属性基加密的CP-ABE密文策略作为云存储数据的加密算法,通过公钥和访问结构树加密明文得到密文。根据所设立椭圆曲线建立数据引用度查询标签,划分加密数据为非频繁引用数据和频繁引用数据两种类型,对两种类型数据分别完成云存储重复数据删重。实验结果表明,所提方法下云存储数据的传送耗时较短,重复数据删重能力较强,具有较强的适用能力。At present,some algorithms of cloud storage data deduplication are unable to encrypt cloud data attribute bases,resulting in a large time overhead of data deduplication.These algorithms are greatly affected by the data size,so they are difficult to be widely applied.Therefore,this paper presented a safe de-duplication algorithm for cloud storage data based on attribute-based encryption.The Ciphertext-Policy Attribute Based Encryption(CP-ABE)was used as the algorithm for encrypting cloud storage data.At first,public key and access tree were used to encrypt plaintext and thus obtain a ciphertext.Then,a query tab of data reference degree was established based on the elliptic curve.Moreover,the encrypted data were divided into infrequently referenced data and frequently referenced data.Finally,the de-duplication was performed on the two types of data respectively.Experimental results show that the proposed method has the adventages of short transferring time of cloud storage data,strong deduplication capability and strong applicability.

关 键 词：属性基加密 云存储 数据冗余 访问结构树 密钥传递 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]