Patent ID: 7890761

Claim:
A method of generating a token value for a user to submit to an authentication service of an electronic system when requesting access to the electronic system to perform an electronic transaction thereat, the token value representing that the user is in possession of an electronic item known to the authentication service, the electronic item having thereon an authenticator application transmitted from the authentication service to the electronic item, the method comprising the authenticator application: obtaining an authentication nonce comprising at least one of an authentication value from the authentication service and a current time value from a clock on the electronic item; wherein obtaining the current time value further comprises sending a message by way of the electronic item to a time service, receiving therefrom a correct time, and updating the clock of the electronic item with such received correct time, the current time value representing an accumulation of time based on such received correct time; retrieving predetermined indicia of the electronic item from a location thereon; combining the obtained authentication nonce and the retrieved indicia of the electronic item to generate the token value; and supplying the generated token value to a location on the electronic item for being submitted therefrom to the authentication service by the user.