When I used to work in a tech shop, the cloud was a new concept and many people, especially businessmen and legal professionals, would have a lot of questions concerning the security of their documents when stored in the cloud. I would do my best to explain that only they had access to their account, but as the cloud was still a fairly vague concept to many people, explaining the benefits would often mean breaking down the features in the most rudimentary of ways. On more than one occasion, people struggling with the concept of cloud computing became angry at the idea their personal or work emails being stored in the cloud, never mind the fact that this had been the case ever since they started using email.