Hashing files for Data Integrity – Hash Tool
If you need to prove the data integrity of a file (ie that it has not been changed), then obtain a hash of that file. A hash is a digital fingerprint of a file. Even the slight alteration will totally change a hash. I would recommend using the SHA-256, SHA-512 or SHA3-512 hash.
Step 1 – Download a free file hashing tool here:
Run & Install
Step 2 – Right click on a file > properties
Select the “File Hashes” Tab
The hashes for several algorithms will be shown.
Select “Settings” to use a different algorithm.
The Hash Tool interface will allow you to select a file and then a hash type that you can copy to the clipboard.
If you would like to see how a simple change to a word will totally change the hash, try out miraclesalad hashing site. Type in a word and then add a full stop to see the hash recalculated on the fly.
You can hash a password, a file or an exe. It ensures “data integrity”, in that you cannot change the file without changing the hash.