How to verify the correct password on LiteSpeed encrypted file?
Password for a specific file is not well identified.
1. xp_restore_checkpassword @filename='pathtofilehere', @encryptionkey='password_here'.
When the correct password is supplied, the message “Encryption key matched successfully” is returned.
2. xp_restore_verifyonly @filename='pathtofilehere', @encryptionkey='password_here'
or xp_restore_headeronly @filename='pathtofilehere', @encryptionkey='password_here'
When the correct password is supplied, the message "The backup set is valid." is returned.
IMPORTANT NOTE: There is no way to retrieve a password for a backup file if the password gets lost.