Existing password means

1. What do you mean by existing password?
2. What is password and its types?

What do you mean by existing password?

In a web applications context, when a user wants to change their current password, generally they would have to enter their current password first. However at this point, the user has already been authenticated using their current password to log in.

What is password and its types?

Passwords can vary in length and can contain letters, numbers and special characters. A password is sometimes called a passphrase, when the password uses more than one word, or a passcode or passkey, when the password uses only numbers, such as a personal identification number (PIN).