For users to access network services such as video streaming from a device, users usually have to register themselves with the service first. Most registration mechanisms require a user to input a username, password, date of birth and other details. When implemented through a web interface, this mechanism is relatively easy for the service provider to provision. However, the problem is that users are required to manually enter significant amounts of information which can be both time consuming, especially on a mobile device where there usually no QWERTY input device, and susceptible to unintentional errors. The present invention proposes an automated registration process that does not require a user to enter any details manually except for the initial request to subscribe to a service. The process gathers information automatically about the user and the device used, which is then stored and used for user authentication during subsequent service requests following the initial subscription request. The subsequent requests for service also do not require the user to manually input any user data.