MCS Password Keeper - Version 1.0 Password Keeper is used to keep track of all those passwords all of us have to remember on a daily basis. How many times have you lost information because you forgot one of your many passwords? If you said 'Lots', join the club. Password Keeper provides a single, secure repository for all your passwords. 'Secure?' You may ask. Yes, Password Keeper used the Blowfish encryption algorithm to keep your secret passwords just that...a secret.