PROCEDE DE TRAITEMENT DE DONNEES PROTEGE CONTRE LES ATTAQUES PAR FAUTE ET DISPOSITIF ASSOCIE

摘要

The method involves performing transformation e.g. multiplicative inverse transformation (MIT), of an input data item into a result data item. A data item that is compressed by applying a compression operation to a result data item is obtained. Another data item compressed by applying the operation to an input data item is obtained. A verification data item is determined by applying the transformation to the latter compressed data item. The verification data item and the former compressed data item are compared to verify the transformation of the input data item into the result data item. An independent claim is also included for a device for cryptographic processing of data.