Patent ID: 8903725
Filing Date: 2014-12-02
Classification: G06F,G10L,H04L

Abstract:
1. Method for controlling user access to a service made available in a data network and/or to information stored in a user database, in order to protect stored user data from unauthorized access, the method comprises: inputting a speech sample of a user to a user data terminal, processing the user's speech sample in order to obtain a prepared speech sample as well as a current voice profile of the user, and outputting an access-control signal to permit or refuse access, taking into account the result of the comparison step, wherein the comparison step includes: comparing an input speech sample with a speech sample model to determine a first similarity measure, and comparing the first similarity measure with an upper threshold value, wherein access is denied if the upper threshold value is exceeded; and if the upper threshold value is not exceeded, comparing, using a voice-profile comparator unit, the current voice profile with an initial voice profile that has been stored in an authorization database to obtain a second similarity measure, and then comparing the second similarity measure with a lower threshold value, and an access control signal that initiates permission of access is generated only if the second similarity measure exceeds the lower threshold value.