Encryption/Decryption when uploading/downloading

I am transferring files [uploading] using SSL to a server. I would like the file[s] to be encrypted on the way, stored encrypted, and decrypted only when I access it through my application. The web based app is in Ruby on Rails, but we can use PHP or anything else, if necessary. The app allows a user to log in and upload their personal resumes. We want only that user to have access to those files [decrypted], and very importantly, everything stored online on our servers must be encrypted, so if someone accesses the server, they cannot see the contents. Thanks. ## Deliverables Please include the technical details you would use for encryption, so I know that you know how security works.