理性秘密共享及其在云存储上的应用

发布时间：2018-04-11 22:40

本文选题：理性秘密共享 + 信念学习模型　；参考：《哈尔滨工业大学》2013年硕士论文

【摘要】：随着大数据时代的到来，数据的存储安全成为了人们越来越关心的问题。而人们对于将自己的数据存储到云端的安全方面的考虑也阻碍着云存储的进一步发展。秘密共享方案在数据安全保护，防止攻击者对数据破坏、窃取等方面一直都起着关键的作用。所以，秘密共享方案的理论研究不仅具有理论意义，更能够推动云存储安全的发展。本文中首先对秘密共享体制进行了综述，详细分析了几个经典的秘密共享方案，接着又首次对社交性理性秘密共享体制(social-rational secret sharing scheme)进行了分析，由于提出的时间不长，但是此方案开启了理性秘密共享研究领域一个新的方向，它将人的社交性，即在社交生活中，个体与个体交往时，信誉是保证，利益是驱动，与理性秘密共享体制进行结合，使得参与者总是选择合作的行为以获得良好的信誉，最终得到分享的秘密或数据，使得利益最大化。本课题提出了一个基于信念学习模型的理性秘密共享方案，此方案首次结合了信念学习，博弈论，信誉机制和秘密共享方案。相对于社交性理性秘密共享体制，此方案加入了信念学习模型，并改进了其信誉机制，参与者可以通过其他参与者过去的行为形成对未来行为的一个信念，在这种情况下，参与者可以视情况来决定自己的策略，使得自己的利益最大化。分析表明，，应用此方案更能刺激参与者进行合作达到一个均衡状态。其次，本课题将可验证秘密共享方案应用到云存储的文件系统中，数据进行存储时，利用秘密共享方案进行分割，然后存储到集群中的数据节点中，读取的时候只需要读取门限值的数据分块即可，剩余的文件作为备份以防止有点数据节点崩溃，还对集群中的节点建立了信誉值网络，对于发送正确数据份额的节点，信誉值上升，反之，则下降。分析表明，系统的安全性得到了提高；系统节点利用率得到了提高；由于只需读取一部分文件份额，读取时所需的时间得到了降低。
[Abstract]:With the arrival of big data era, data storage security has become more and more concerned by people.The further development of cloud storage is hindered by the security considerations of storing their data into the cloud.Secret sharing scheme plays a key role in data security, preventing attackers from destroying and stealing data.Therefore, the theoretical research of secret sharing scheme not only has theoretical significance, but also can promote the development of cloud storage security.In this paper, firstly, the secret sharing scheme is reviewed, several classical secret sharing schemes are analyzed in detail, and then the social-rational secret sharing scheme is analyzed for the first time.However, this scheme opens a new direction in the field of rational secret sharing, which combines the social nature of human beings, that is, in social life, when individuals interact with individuals, credibility is guaranteed, interests are driven, and rational secret sharing system is combined.It makes participants always choose cooperative behavior to obtain good reputation, and finally get shared secrets or data, so as to maximize the benefits.In this paper, a rational secret sharing scheme based on belief learning model is proposed. This scheme combines belief learning, game theory, reputation mechanism and secret sharing scheme for the first time.In contrast to the social rational secret sharing system, the scheme adds a belief learning model and improves its reputation mechanism, in which participants can form a belief in future behavior through past behavior of other participants.Participants can decide their own strategies according to the circumstances and maximize their own benefits.The analysis shows that this scheme can stimulate the participants to cooperate to achieve a balanced state.Secondly, the verifiable secret sharing scheme is applied to the file system stored in the cloud. When the data is stored, the secret sharing scheme is used to divide the data, and then stored in the data node in the cluster.The remaining files are backed up to prevent some data nodes from crashing, and a creditworthiness network is established for the nodes in the cluster, where the correct data share is sent.The prestige value rises, conversely, drops.The analysis shows that the security of the system is improved, the utilization ratio of the system nodes is improved, and the time required to read the system is reduced because it only needs to read part of the file share.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333;TP309

【共引文献】