Patent ID: 7937590
Filing Date: 2011-05-03
Classification: G06F,G07C

Abstract:
1. A portable device for authenticating a user based on digital biometric data, including: a digital biometric data sensor; an integrated circuit chip including a physical parameter network configured to provide an identifier specific to the integrated circuit chip, wherein the physical parameter network measures an electric parameter of the integrated circuit chip and provides the identifier based on the electric parameter, the electric parameter being a specific signature of the integrated circuit chip resulting from technological and manufacturing process variations; a register configured to temporarily store the identifier only upon authentication or storage of a template; a combining element configured to combine by a one-way scrambling operation, the identifier with currently-sensed digital biometric data provided by said digital biometric data sensor to form current combined data; a storage element configured to store one or several reference templates, each reference template formed by combining previously-sensed digital biometric data with the identifier using a one-way scrambling operation; and a comparing element configured to compare the current combined data with one of the reference templates, wherein the current combined data and the one of the reference templates remain in scrambled form during the comparison.