1. A method of applying an access policy to a computer file, comprising: receiving a request to modify a computer file, the computer file comprising file user data and file meta data associated with the user data; writing a first indicator to the file meta data in response to the request; receiving a second request to execute the computer file; determining, in response to receiving the second request, the file meta data includes the first indicator; selecting, in response to the determining. a first policy from a plurality of policies; and applying the selected policy to the request.