通信学报 ›› 2017, Vol. 38 ›› Issue (5): 121-127.doi: 10.11959/j.issn.1000-436x.2017106

• 学术论文 • 上一篇    下一篇

云环境下基于安全网络编码的数据更新算法

吴昊1,赖成喆1,范九伦1,刘建华2   

  1. 1 西安邮电大学通信与信息工程学院,陕西 西安 710121
    2 西安邮电大学信息中心,陕西 西安 710121
  • 修回日期:2017-04-06 出版日期:2017-05-01 发布日期:2017-05-28
  • 作者简介:吴昊(1981-),男,江苏武进人,西安邮电大学讲师,主要研究方向为信息安全。|赖成喆(1985-),男,陕西汉中人,博士,西安邮电大学副教授,主要研究方向为信息安全。|范九伦(1964-),男,河南温县人,博士,西安邮电大学教授,主要研究方向为信号处理和信息安全。|刘建华(1963-),男,陕西宝鸡人,西安邮电大学高级工程师,主要研究方向为信息安全。
  • 基金资助:
    国家自然科学基金资助项目(61502386);陕西省国际科技合作与交流计划基金资助项目(2015KW-010)

Data update algorithm based on secure network coding in cloud environment

Hao WU1,Cheng-zhe LAI1,Jiu-lun FAN1,Jian-hua LIU2   

  1. 1 School of Communication and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China
    2 Information Centre,Xi’an University of Posts and Telecommunications,Xi’an 710121,China
  • Revised:2017-04-06 Online:2017-05-01 Published:2017-05-28
  • Supported by:
    The National Natural Science Foundation of China(61502386);The International Science and Technology Cooperation and Exchange Plan in Shaanxi Province(2015KW-010)

摘要:

在云环境下进行数据存储时,利用安全网络编码技术可以很好地解决数据的隐私性和可靠性问题。但经过网络编码后的各个编码块通常具有很高的相关性,文件内容极少的变化都需要重新编码,极易造成数据泄露,同时严重消耗了系统资源。为此,提出一种网络编码云存储数据更新算法,存储节点只需要根据服务器发送的差值矩阵,更新部分编码块,就可以完成整个文件的更新。实验结果表明,所提算法和RS编码、Tornado编码相比,在保证了数据安全的前提下大大提高了数据更新和数据重构的效率。

关键词: 云存储, 网络编码, 数据更新, 隐私保护, 差值矩阵

Abstract:

In the cloud environment for data storage,the use of secure network coding technology can be a good solution to the data privacy and reliability issues.However,each coding block usually has a high correlation after network coding,very few updates to the file need to be re-encoded which is extremely easy to cause information leakage and serious consumption of system resources.To solve this problem,a network coding cloud storage data updating algorithm was proposed.Just by sending files change difference matrix,the storage node could update parts of the coding block accordingly which could complete the entire update files.Experimental results show that compared with RS coding and Tornado coding,the algorithm can not only ensure data security,but also greatly improve the efficiency of data update and data reconstruction.

Key words: cloud storage, network coding, data update, privacy protection, difference matrix

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