EFFICIENT SYNCHRONISATION OF SMART CARD DATA WITH DATA STORED ON AN EXTERNAL SERVER

摘要

Data which is stored on a smart card is sent to a device external to the smart card. The data is stored on the smart card in a field of entries, the field of entries on the smart card is indexed and a flag is associated with each field index, indicating whether the entry belonging to the index has changed or not. The external device has an indexed field of entries which matches the field of entries on the smart card. To the external device only those entries are sent, together with their index value, where the flag associated with the index indicates a change. The flags associated with the indices whose entries were sent to the smart card are cleared. The entries are received on the external device external to the smart card, together with their index values and each of the received entries is stored in the field on the external device at the position indicated by the index value received together with the entry.