Patent attributes
Systems and techniques to provide transparent authentication integration. In general, in one implementation, the technique includes: receiving a request from a client to take an action with respect to an electronic document, in response to the request, obtaining an authentication process, and sending the authentication process to the client for use in identifying a current user and controlling the action with respect to the electronic document based on the current user and document-permissions information associated with the electronic document. Obtaining the authentication process can involve requesting and receiving the authentication process from a second server. The authentication process can use an existing interface provided by the client to communicate authentication information to the server.