International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Cloud storage service is widely used to outsource data. However, the data owners have security concerns on the cloud storage services as the cloud service providers focus more on storage rather than security. This paper considers a scenario where data owners store and retrieve metric data into cloud. The data owners give access rights to their trusted clients. The trusted clients can make similarity queries on the outsourced metric data. This paper focuses on security mechanisms to be applied between the data owner and cloud server and trusted client and cloud server. Various techniques are built to transform and encrypt data before storing to database server for security reasons. The queries made by trusted clients are also protected in the same fashion.