云存储视频安全技术研究

发布时间：2018-06-02 02:51

本文选题：云存储 + 编码视频　；参考：《南京邮电大学》2014年硕士论文

【摘要】：云计算是当前信息和通信领域的大热门，随着数字视频在社会生活不断普及，通过云存储平台存储和共享编码视频也成为必然的趋势云平台被认为是不安全的，本文采用CP-ABE加密算法保护云中编码视频数据的安全，并分析研究了直接使用CP-ABE算法加密云平台中的编码视频数据所存在诸多问题本文首先提出了一种云存储共享编码视频加密与访问策略更新方法通过分析H.264/AVC视频码流特征，构建数据依赖关系，并根据依赖关系构建关键数据包和非关键数据包基于CP-ABE算法加密关键数据包上传云存储服务器，而非关键数据包以明文形式直接上传只加密关键数据包，可以有效减少加密数据量，提高加密效率此外，在调整加密视频访问控制策略时，只需要从云端取回关键数据包，重新调整关键数据包的访问控制策略实验结果表明，本方法达到了视频安全的要求，并且可以明显提高访问控制策略更新的效率其次，本文提出了云存储共享3D编码视频的安全分层接入策略为了实现分层接入，提出了SCP-ABE算法，在3D视频单密文中嵌入多重访问控制策略属性，结合单方向散列函数，实现了根据用户属性集合动态地为用户提供不同层级的视频接入服务实验结果表明，该3D视频安全分层接入策略可以在保证视频安全的前提下，根据用户属性集合为用户提供包括禁止接入2D视频接入和3D视频接入的不同视频服务，达到设计目的最后，提出了云存储共享编码视频数据数字水印追踪方法在基于CP-ABE算法实现云存储共享编码视频安全接入中，针对授权用户私自泄漏视频数据，由于CP-ABE算法属于一对多的加密体制而无法进行有效责任鉴定的问题，改进CP-ABE解密算法，，在原解密算法中加入水印嵌入算法在授权用户解密视频数据时，嵌入用户标识信息，当发生视频数据外泄时，通过外泄视频中水印信息进行有效责任鉴定实验表明，所设计视频水印嵌入算法具有较好鲁棒性和非可视性，可达到利用数字水印进行视频数据追踪的目的
[Abstract]:Cloud computing is one of the most popular in the field of information and communication . With the popularity of digital video in social life , the storage and sharing of encoded video by cloud storage platform has become an inevitable trend cloud platform , which is considered to be unsafe . In this paper , a CP - ABE encryption algorithm is used to protect the security of video data encoded in the cloud , and the problems of encoding video data directly using the CP - ABE algorithm in the cloud platform are analyzed .

This paper first puts forward a method for updating cloud storage shared coded video encryption and access policy . By analyzing the characteristics of H.264 / AVC video code stream , the data dependency relation is constructed . The key data packet and non - critical data packet are encrypted based on the dependence relationship . The key data packet is uploaded to the cloud storage server based on the CP - ABE algorithm .

Secondly , this paper proposes a secure layered access strategy for cloud storage sharing 3D coded video . In order to realize hierarchical access , the SCP - ABE algorithm is put forward . The multi - access control strategy attribute is embedded in the 3D video single cipher text . According to the single - direction hash function , the experiment results show that the 3D video security layered access policy can provide users with different video services including forbidden access to 2D video access and 3D video access according to the user attribute set .

in that end , a digital watermark trac method for cloud storage sharing encode video data is proposed in the cloud storage share - coded video secure access based on the CP - ABE algorithm , and the CP - ABE algorithm is used to solve the problem of invalid responsibility identification by the CP - ABE algorithm , and the CP - ABE algorithm is added with the watermark embedding algorithm to authorize the user to decrypt video data , and the watermark embedding algorithm is added into the original decryption algorithm to carry out effective liability identification experiment , and the design video watermark embedding algorithm has good robustness and non - visibility , and the purpose of tracking the video data by using the digital watermark is achieved .
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP333;TP309

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