Data carrier

摘要

A data carrier is disclosed. The data carrier includes a data processing unit and at least one contactless interface via which the data processing unit can be coupled to a read/write apparatus in order to exchange data signals and to take up electrical energy for the operation of the data processing unit; the data processing unit is constructed at least mainly while using at least substantially asynchronously operating logic components (asynchronous logic). The data carrier according to the invention, such as a chip card, makes optimum use of the energy applied thereto and is at the same time protected against the tapping of the signal processing steps to be executed therein.