: Turn on Multi-Factor Authentication (MFA) to provide an extra layer of security even if an attacker has your password. Have you received a security alert recently, or

: Specifies the format of the data, which is typically Username:Password or Email:Password pairs separated by a colon.

These lists are primarily used in attacks. Attackers use automated tools to "stuff" these millions of usernames and passwords into various login pages to see which ones work. Because many users reuse the same password across multiple sites, a leak from a small gaming forum might grant an attacker access to more valuable accounts like email or banking. Risk and Prevention

If you find your information in such a list, it means your credentials have been compromised in a past data breach. Security experts from Norton Support and Aura recommend:

: Often used in underground forums to claim that the credentials have a high "hit rate," meaning a larger percentage of the accounts are likely still active or haven't been recently flagged.

The name reveals several specific details about the file's intended use and content:

: Change the password for any accounts that used the compromised credentials.