A first network device is configured to receive a request for content from a user device, determine that the user device is not authenticated, and send information to the user device that the user device requires authentication. The first network device is configured further to receive authentication information for the user device from a second network device. The first network device is configured further to generate a secret key, authenticate the user device. The first network device is configured further to request user knowledge information from the user device, validate the user knowledge information and send the content to the user device.