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In a hierarchical system, a set of users with ranked rights are organized in a tree-architecture, and the user with higher grade can search and access data of users with lower grade in its branch. Nowadays hierarchical systems are constructed by utilizing the cloud to improve their performance due to the cloud server's powerful computation and storage capabilities. However, the untrusted cloud server...
The advent of cloud computing has dramatically changed the IT scene, as it offers cost savings and improvements to major operations. Nevertheless, the major obstacle relies on the effort on how to secure sensitive data files that are outsourced to the cloud environment. To ensure confidentiality, the sensitive data are usually encrypted prior to being outsourced. Nevertheless, effective data utilization...
The problem of access control on outsourced data to "honest but curious" cloud servers has received considerable attention, especially in scenarios involving potentially huge sets of data files, where re-encryption and re-transmission by the data owner may not be acceptable. Considering the user privacy and data security in cloud environment, in this paper, we propose a solution to achieve...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.