For example, from Linux command line:
This command will return you a string of 64 characters which could be considered as a strong password.
You don’t have to remeber the password, you have to remember the file (photo, mp3 or whatever you like).
Use on Android
There are a lot of free apps on Android providing hash functionality. I often use Hash Droid.
Please, keep in mind:
- Always keep a secure backup of your “secret” file, even better in a cloud service. If you lose this file, you lost your password…
- Always erase bash history line contains the command
sha256sum /path/to/somephoto.jpg. Nobody can be able to see this command. See details in this post.