Method for testing the authenticity of a data carrier
AssigneeGiesecke & Devrient GmbH
InventorsMichael Lamla, Wolfgang Rankl, Franz Weikmann, Wolfgang Effing
Life of this patent
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Abstract
A method for testing the authenticity of a data carrier having at least an integrated circuit with memory units and logic units as well as a data line for data exchange with an external device. The invention is characterized in that the integrated circuit additionally has a separate hard-wired circuit for transmitting and/or receiving data during the power-up sequence, which is used for authenticity testing, the first transmission or reception of data being completed within a defined time domain of the power-up sequence in which the data line has no defined state.
Claims26
A method for testing the authenticity of a data carrier having at least an integrated circuit with memory units and logic units and exchanging data with an external device via a data line, the data carrier receiving the operating and control signals necessary for operation from the external device, characterized by the steps of:
- transmitting and/or receiving data during a power-up sequence defined according to a protocol, via a separate, hard-wired circuit, and using the transmission and/or reception of data to test the authenticity of the data carrier, wherein the first transmission or reception of data used for authenticity testing is completed within a defined time domain of the power-up sequence in which the data line has no state defined by the protocol.
A data carrier assembly including a data carrier having at least an integrated circuit with memory units and logic units and exchanging data with an external device via a data line, the data carrier receiving the operating and control signals necessary for operation of the data carrier from the external device and the external device having access for reading and/or writing at least to partial areas of the memory units of the data carrier, characterized in that the integrated circuit additionally has a separate hard-wired circuit for transmitting and/or receiving data during a power-up sequence defined according to a protocol, which is used for authenticity testing, the separate circuit performing the first transmission or reception of data used for authenticity testing independently of the logic units and memory units of the data carrier within a defined time domain of the power-up sequence in which the data line has no state defined by the protocol.
Dependencies are inferred from the claim text.