云存储下数据完整性和安全性研究

发布时间：2018-02-14 16:06

本文关键词： 云计算云存储公开审计数据完整性隐私安全　出处：《长安大学》2016年硕士论文　论文类型：学位论文

【摘要】：云计算是目前信息技术发展的重要趋势之一,它使得用户可以便捷、经济地使用云端服务。云存储技术是云计算领域的重要分支,云用户能够将自己的数据存储在远端云服务器上而本地无需保存。尽管云存储技术节省了用户大量的存储资源,但是云服务器可能出于某些目的恶意篡改或删除用户数据,因此用户有必要对存储在远端云服务器上的数据进行完整性验证。然而数据海量性和用户有限计算能力使得数据完整性验证对于用户而言是非常困难的,此时用户能够授权第三方审计者对数据进行公开审计,但审计者能够在审计过程中窃取用户的数据,从而泄露用户的隐私信息。因此,如何解决云存储中数据完整性和隐私性问题已成为目前云计算研究领域的热点问题。本文针对云存储中数据完整性和安全性进行了深入研究,给出具体的数据公开审计方案,并分析其安全性和性能。具体包括:(1)针对云存储中数据完整性和安全性问题,利用双线性对提出新的云存储中数据完整性和隐私保护公开审计方案。安全性分析表明,所提方案满足审计正确性、不可伪造性、隐私保护和抗替换攻击;性能分析表明,所提方案减少了通信成本和计算量,提高了审计效率具有更好的实用性。(2)针对双线性对运算量高的不足,提出了新的云存储中无需双线性对运算的数据完整性公开审计方案。安全性分析表明,所提方案满足审计正确性、不可伪造性、数据完备性和隐私保护;实验结果表明,所提方案在增加通信代价基础上,减少了计算代价。通过通信开支换取计算开支,这在计算资源匮乏和需快速审计的系统中显得尤为重要,新方案在云计算的应用普及中具有实际意义。
[Abstract]:Cloud computing is one of the important trends in the development of information technology, which makes it convenient and economical for users to use cloud services. Cloud storage technology is an important branch of cloud computing. Cloud users can store their data on a remote cloud server without having to save it locally. Although cloud storage technology saves users a lot of storage resources, the cloud server may maliciously tamper with or delete user data for some purpose. Therefore, it is necessary for the user to verify the integrity of the data stored on the remote cloud server. However, because of the huge amount of data and the limited computing power of the user, it is very difficult for the user to verify the integrity of the data. At this point, the user can authorize a third-party auditor to conduct a public audit of the data, but the auditor can steal the user's data in the course of the audit, thereby revealing the user's privacy information. How to solve the problem of data integrity and privacy in cloud storage has become a hot issue in cloud computing. And analyzes its security and performance, including: 1) aiming at the problem of data integrity and security in cloud storage, a new public audit scheme of data integrity and privacy protection in cloud storage is proposed by using bilinear pairs. The security analysis shows that, The proposed scheme satisfies audit correctness, unforgeability, privacy protection and resistance to substitution attacks, and performance analysis shows that the proposed scheme reduces communication cost and computation. Improving audit efficiency has better practicability. (2) aiming at the shortage of bilinear pair operation, a new public audit scheme of data integrity without bilinear pair operation in cloud storage is proposed. The security analysis shows that, The proposed scheme satisfies the audit correctness, unforgeability, data completeness and privacy protection. The experimental results show that the proposed scheme reduces the computational cost on the basis of increasing the communication cost. This is particularly important in computing systems that are short of resources and need rapid auditing. The new scheme has practical significance in the popularization of cloud computing applications.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP309;TP333

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