ABSTRACT
The organizations and people in our digital society are collecting more and more data in their daily business and life. For an individual company or person, they may not have enough computation and storage capability to manage their data. To address this problem, they can outsource their data to a cloud, which provides a powerful platform to store and process data for its clients. However, with this outsourcing solution, the clients might concern whether their data is managed properly in the cloud, in terms of both data privacy and integrity, since they no longer have the physical control over their data.
