Files.com is the best system for protecting sensitive files while file sharing. This is primarily because the service enforces strong encryption both in transit and at rest on the Files.com server. However, the usage practices of Files.com create stronger security because loading documents to be shared onto the Files.com server reduces the number of transfers that need to be performed when distributing documents. Users are given access to the document on the Files.com server rather than receiving a copy. This makes access control and logging easier to implement.