| 摘要 |
The invention relates to a method of authenticating a user (N). In a dialog between the user (N) to be authenticated and a dialog system ( 1 ; D), a plurality of security queries is performed by the dialog system ( 1 ; D). A security query is taken from one of a plurality of predetermined categories of questions and/or corresponds to one of a plurality of predetermined types of questions. The user (N) supplies answers to the security queries in the form of speech to the dialog system ( 1 ; D) and the user's (N) answers are evaluated. A user (N) is authenticated or not authenticated in dependence upon the result of the evaluation.
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