Privacy protection and security in eHealth cloud platform for medical image sharing

Sharing medical images in public cloud can greatly help physician in their daily practice by allowing them to reach a diagnostic more quickly. However, such images are sensitive and need to be protected. In the current literature, the security aspects of this issue are well studied but the privacy aspects and especially the linkability problem is under estimated. In this paper, we propose two mechanisms to solve this issue. First, a caching third party that prevent the cloud provider (CP) to link the records from their time of acquisition is proposed. Then the use of Oblivious Transfer (OT) is put forward to prevent the CP from knowing which images are accessed by a given consumer practitioner. The global architecture for medical images sharing is then described and discussed.