Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (1): 314-322.doi: 10.13229/j.cnki.jdxbgxb20200657

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Method to enhance security function of OpenStack Swift cloud storage system

Yuan SONG1,2(),Dan-yuan ZHOU1,2,Wen-chang SHI1,2()   

  1. 1.School of Information，Renmin University of China，Beijing 100872，China
    2.Key Laboratory of Data Engineering and Knowledge Engineering （Renmin University of China） of Ministry of Education，Beijing 100872，China
  • Received:2020-05-26 Online:2021-01-01 Published:2021-01-20
  • Contact: Wen-chang SHI E-mail:jlxcsy@ruc.edu.cn;wenchang@ruc.edu.cn

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Abstract:

To solve the security problem caused by OpenStack Swift cloud storage system directly and completely storing user files， this paper proposes a method to enhance its security function. First of all， the user files are divided into several fragments by using data dispersal technology， which makes it difficult for attackers to obtain complete user files； Second， the segmented files are stored in ciphertext form through data encryption technology to prevent attackers from using the logical relationship between segmented file contents to recover complete user files； In addition， this paper presents a hierarchical management approach to protect various keys in different layers， and combines user password with secret sharing to prevent cryptographic materials leakage. The experimental results indicate that it will increase the difficulty for attackers to obtain user files after using this method， so as to ensure the security of data storage in OpenStack Swift system， and the performance cost is acceptable to users.

Key words: computer application technology, cloud computing, cloud storage security, data dispersal, data encryption, key management

CLC Number: 

  • TP309

Fig.1

OpenStack Swift system architecture"

Fig.2

Data organization in Swift system"

Fig.3

Swift system storage principle"

Table 1

Data storage example in Swift system"

示例项目名称备注
user1Account租户名
textsContainer容器名
getfilecontxtObject对象名
/srv/nodePath设备挂载点
/sdb1Device存储设备名
59376b34b3ae4d8fa6912145ce2a3d31Name_HashAccount/Container/Object的散列值
22Partition Shift Value虚节点右移位值
356Partitions虚节点号
d31Suffix_pathName_Hash的后3位
1460524504.69899Timestamp文件名时间戳
.dataExtension文件扩展名

Fig.4

Enhanced Swift system architecture"

Fig.5

Enhanced security function"

Fig.6

Enhanced Swift implementation architecture"

Table 2

Prototype system experimental environment"

分类代理服务器存储服务器
型号PowerEdge R230System X3650 M3
数量1台4台
CPU8核4核
网络带宽1000 Mbit/s1000 Mbit/s
硬盘容量10TB146GB X 2 /台
操作系统Ubuntu 14.04 LTSUbuntu 14.04 LTS

Table 3

Ciphertext storage"

块号存储块号存储
05
16
27
38
49

Fig.7

File upload time cost comparison"

Fig.8

File download time cost comparison"

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