Secure Cloud Storage

Abstract

This bachelor of science thesis describes and discusses the development of a secure cloud storage service. The service is secure in the sense that no one other than the owner of the le can access the information stored with our service. Our solution does not require implementation of a cloud storage service but instead uses an existing cloud service and adds a security layer to it. On top of that we have also produced a protocol for how to share encrypted les between users of the system without revealing any vital information to the server, nor to any potential adversaries.