The Master Password is an important secret component in Locker’s Two-secret Key Derivation process, and is the only item a user needs to memorize for data encryption and decryption.

We strongly recommend that users choose a strong Master Password to ensure security as well as to prevent common types of password attacks (eg. brute force) performed through supercomputers. Locker also incorporates a password strength meter to evaluate the Master Password a user is creating and display a warning. A strong Master Password should comprise a combination of lowercase and uppercase letters, numbers, and special characters so that it is not easily stolen.