FIELD: information technology.
SUBSTANCE: method comprises the steps of inputting via said data input interface a user personal code into the user device, inputting into the user device a service provider code, which is a service provider where the user registered their name, fetching the equipment identifier from the data storage means of the user device, calculating in the user device a security code based on a combination of at least said equipment identifier, said user personal code and said service provider code, and outputting the calculated security code, the security code thus calculated in itself representing both the user and the user device for one specific service provider.
EFFECT: high security for authenticating a user, provision for reception of unique user authentication codes by different service providers from a universal semiconductor device.
12 cl, 8 dwg
