Coding scheme for file backup and systems based thereon

摘要

The present invention concerns a method and system for protection against corruption of data. In order to backup files to be stored in a storage medium, a set of redundant parity symbols is computed by encoding cross-sections across said files using a systematic code. These parity symbols and the files are then stored for later retrieval. If some of these files are erased, corrupted, damaged or infected by a virus, they are reconstructed by decoding the surviving files and the parity symbols.