A method is provided for authenticating a user by a computing platform containing a trusted component having a secure processor protected from physical and logical interference. The method comprises the secure processor authenticating a biometric reader; the secure processor authenticating a secure token containing authentic user biometric data; capture of user biometric data by the biometric reader, and transfer of the captured user biometric data to the secure processor; transfer of the authentic user biometric data to the secure processor; comparison of the authentic user biometric data with the captured user biometric data; and authentication of the user by the secure processor on the basis of the biometric data comparison. A data processing system for providing such authentication (and each of the components of such a system: a computing platform, a biometric reader, and a secure token, preferably a smart card) are also provided.
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