Software backup method e.g. for computer system, has backup copies of workfiles to be protected from manipulation which are stored in secondary data area and are protected by asymmetric cryptography

摘要

The method involves having backup copies of workfiles to be protected from manipulation are stored in a secondary data area and are protected by preferably asymmetric cryptography. A comparator compares the backup copies or the proof total of it with the respective work files and initiates a corrective action if any differences are found. In consequence of a released signal the work copy is replaced by the backup copy. Groups from files to be formed and replacing the changed work copies by the respective backup copies as unit takes place.