The privacy of sensitive personal information is more and more important topic as a result of the increased availability of cloud services. These privacy issues arise due to the legitimate concern of a security breach on these cloud servers and the leaking of this sensitive information due to an honest but curious individual at the cloud service provider. Standard encryption schemes try to address the first concern by devising encryption schemes that are harder to break, yet they don’t solve the possible misuse of this sensitive data from the cloud service providers. Homomorphic encryption presents a tool that can solve both types of privacy concerns. The clients are given the possibility of encrypting their sensitive information before sending it to the cloud. The cloud will then compute over their encrypted data without the need for the decryption key. By using homomorphic encryption, servers guarantee to the clients that their valuable information to have no problems after being in a difficult situation.
