: Use tools to see if your email has been involved in known breaches.

A combolist is an aggregated file containing large volumes of usernames or email addresses paired with passwords, often formatted as email:password .

: Always enable Two-Factor Authentication (2FA) on your Riot Games account. Even if an attacker has your password from a combolist, they cannot log in without the second factor.

: Use a password manager to generate and store a unique, complex password for every site you use.