: Prevent automated scripts from testing thousands of accounts at once.
: Even if a hacker has your password from a list like "20k_Email_Account_.txt," MFA (via an app like Google Authenticator or a security key) can prevent them from logging in.
If you are a security researcher or a concerned user, follow these steps to handle the situation safely: 20k_Email_Account_.txt
If you are trying to protect your users from these types of lists:
: Use APIs (like the HIBP API) to block users from choosing passwords known to be in leaked "combolists." : Prevent automated scripts from testing thousands of
: If you are worried your information is in such a list, use Have I Been Pwned . Enter your email to see which specific breaches you were involved in.
: If your email appears in a breach, immediately change that password and any other account where you reused it. Use a Password Manager (like Bitwarden or 1Password) to ensure every account has a unique, complex password. Enter your email to see which specific breaches
Accessing or using accounts that do not belong to you is a violation of the Computer Fraud and Abuse Act (CFAA) in the US and similar laws globally (e.g., the UK Computer Misuse Act).