1. A method for restricting use of a clipboard application, the method comprising: determining whether a copy selection associated with designated content of a source file being displayed by a first source application has been made; storing the designated content to the clipboard application; receiving a copy command associated with the copy selection, the copy command including a flag or indicator associated with a user; authenticating the user based upon the received flag or indicator; and determining whether the source file is a secured file, wherein the secured file includes a header having a file key available to the authenticated user, and wherein the secured file cannot be accessed without the file key.