Secured digital systems and a method and software for operating the same

摘要

Secured data systems only process file units which have not been compromised, such as by a malicious attack or corrupted data. The file units remain encrypted except during processing with successive generations of each encrypted file unit stored in a secured memory, which cannot be overwritten but only copied. Compromised file units are reconstructed or replaced by the last pure generation stored in secured memory. System operation is automatically restored following a fault, although the likelihood of faults is reduced by frequent optimization of system operation. Digital systems only accept file units from other secure digital systems having an approved digital identifier, which is embedded in each file unit.