Security is a critical aspect for providing trust in DfR and encouraging adoption. It is not one feature but a set of features spread across all components, services and clients. The public cloud present special problem because the even we (the provider of the DfR SAAS) cannot audit and managing the infrastructure upon which the service runs so that exploits from "behind the scenes" cannot be completely prevented. Also, there is a strong trend (of which DfR is an example) towards a network of distributed data and service.