It’s an awesome fact that the integrity of a file – its fixity – can be measured mathematically.
Numbers don't lie. The beauty of digital files is that they're built of 0's and 1's and each file has what amounts to a unique mathematical value called a checksum. Anytime a file is edited or becomes corrupted in some way, its checksum changes.
We calculate the checksum of your files and make sure they don't change over time. In this way, redundant copies of the file can be used to restore integrity and ensure file preservation.