Privacy Preserved Data Retrieval Over Encrypted Data

作     者：阿西 

作者单位：广西大学 

学位级别：硕士

导师姓名：黄汝维

授予年度：2018年

学科分类：0839[工学-网络空间安全] 08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主      题：cloud computing ranked keyword search data retrieval hierarchical index search privacy preserved 

摘      要：Cloud Computing is growing up technology in current era,we can say it is being used widely in our daily life and it has become essential part of the *** computing provides us to online access of computational and network resources by using *** services offer us to low cost and provide large amount of storage for data to attract end users on *** of the most popular and worldwide service is called data *** is convenient and low cast way for public and private organizations as well to outsource their date,they enjoy the advantages of remote storage and management,file sharing,back-up servers,email platform *** daily life,files storage is one of the common uses of *** the same time concern is that to store important and sensitive data on un-trusted cloud *** this concern we always use encryption scheme to encrypt sensitive information to outsource.A casual way to download the data,decrypting and searching our demanded data locally is not the efficient and meaningless when we store our important information on *** servers must enable searching scheme to retrieve encrypted data without unauthentic users because we cannot depend on severs own security,users don’t want to take risk on their sensitive *** this dissertation,we will discuss about retrieval encryption schemes from encrypted data by *** retrieval from cloud by using ranked search,keyword search and hierarchical index search,However,traditional searchable encryption techniques use Boolean search to search data via keywords,but this technique does not satisfy the effective data utilization for multi users data need and also to retrieved big data files from *** has been proposed index techniques where we can allocate the sequence on the cloud and encrypt it when it is outsourced but they have not ability to keep in order preserving-position when users fetch the ciphertext from the *** problem is solved by using ranked keyword se