To extrack hash from private.asc file
To see available keys in your system $ gpg --list-secret-keys If you have a backup.gpg keys with encrypted format. Then you need a key to decode it. If you found the key in some file. Then simple import that file in your syste $ gpg --import private.asc If the private.asc file is in encrypted format then they ask password to decrypt and import to our system. we can also crack private.asc key by extracting hash from it by using john ...