Numeric passwords are security codes made up of numbers, typically ranging from four to six digits. They are commonly used to protect access to devices, accounts, and services, such as mobile phones and online banking. Numeric passwords are easy to remember but can be vulnerable to guessing or brute-force attacks if they are too simple. To enhance security, users are encouraged to create unique numeric passwords that do not follow predictable patterns, like "1234" or "0000." Additionally, some systems may implement features like two-factor authentication to provide an extra layer of protection beyond just the numeric password.