A password is a secret word, phrase or special string of characters used for proving the identity of authorized users.
Depending on its type, a password can be a passphrase (when it is composed of several words) or a passcode (when it includes only numbers).
In order to make sure that the password protecting various types of data is strong enough, password generators are often used.
They produce random strings of characters, including numbers, uppercase and lowercase letters and/or symbols.
The more characters a password contains, the harder it is to break it. Also, if the symbols are varied, the password strength increases.