A system arranged to authenticate a user via its mobile device to a service provider, the system comprising: an authentication server; the user mobile device, the user mobile device provided with a verification application arranged to communicate with the authentication server; and a notification server in communication with the authentication server and arranged to transmit a notification to the user mobile device responsive to the authentication server, the authentication server arranged to provide a signed authentication to the service provider responsive to present and historical information regarding one of: the user mobile device; and an additional user device in communication with said authentication server, said signed authentication provided in accordance with a rule set determined by an authorized entity stored on said authentication server memory governing the required present and historical information attribute.