Methods and systems are provided for user authentication in communication systems. An identification token may be generated in response to a request from a user terminal to load a web page. The identification token may comprise a network address associated with the user terminal, and a time stamp indicating when the network address was used by the user terminal. User authentication information relating to the identification token may then be obtained to authenticate a user of the user terminal. The user terminal may be instructed to request the identification token in response to requesting the web page.