USER AUTHENTICATION

摘要

Disclosed is a method for providing a user access to a computer system (400) comprising a plurality of services (10) and a plurality of authentication levels (20), the method comprising dynamically monitoring (212, 214) a risk profile of a user authenticated on said computer system; dynamically selecting (216) an authentication level for each of said services based on said monitored risk profile; and if said authentication level for a service is higher than an actual authentication level for said user, sending a further authentication request (224) to the user requesting the user to provide authentication information corresponding to the dynamically selected authentication level upon said authenticated user requesting access to said service.