Secure data storage in the cloud with homomorphic encryption

The adoption of cloud computing is accelerating among health care providers, as they realize the limitations of traditional systems of computerized medical file. Many obstacles must be overcome, however, with regard to respect for privacy and patient safety. In order to ensure the respect for privacy, an encryption of data is required. An encryption that allows to compute over encrypted data without having to decrypt. In this paper we focus on cloud computing and its adoption in different domain, we describe the role of homomorphic encryption scheme for preserving privacy data sharing in the cloud and propose a system that ensures confidentiality of data by using partial homomorphic encryption algorithms.