Process and arrangement for authenticating a user of facilities, a service, a database or a data network

Process for authenticating a user, to control his remote access to a service, data base or data network, wherein, in an enrolment step, an initial voice sample provided by the user is analyzed to obtain an initial user-specific voice profile and, in a later verification step, a current voice sample provided by the user is analyzed to obtain a current voice profile which is compared to the initial voice profile to generate an access control signal in response to the result of the comparison step, wherein additional user-dedicated authenticating means are generated in a pre-enrolment period, the additional authenticating means being used to authenticate the user in the enrolment step and/or in an access control step prior to and independent on the enrolment step, in a provisional or supplementary authentication procedure, wherein in the enrolment step, as well as in the verification step, at least data elements of the additional authentication means are requested from the user as a voice sample and spoken by the user to be made subject of the analysis of his initial voice sample, without involving a speech recognition step.