Verfahren zum sicheren Berechnen eines Ergebniswerts bei einem Mikroprozessorsystem

摘要

Method for safe calculation of a result (E) in a microprocessor system whereby: a first calculation of the result value is undertaken to produce a first computer result (E1), a second calculation is carried out to produce a second computer result (E2), the two results are compared and, if the two values do not agree, the calculated result is characterized as faulty. - The invention also relates to a corresponding microprocessor and data carrier, especially a chip card or chip module for implementing the inventive method.