Master Password (algorithm)

Master Password is a type of algorithm first implemented by Maarten Billemont for creating unique passwords in a reproducible manner. It differs from traditional password managers in that the passwords are not stored on disk or in the cloud, but are regenerated every time from information entered by the user: Their name, a master password, and a unique identifier for the service the password is intended for (usually the URL).[1]

By not storing the passwords anywhere, this approach makes it harder for attackers to steal or intercept them. It also removes the need for synchronization between devices, backups of potential password databases and risks of data breach. This is sometimes called sync-less password management.