Pwned Passwords

Have I Been Pwned: How to Check If Your Passwords Have Leaked Online

The article explains how users can independently verify whether their email addresses or passwords have appeared in known data breaches. It distinguishes between three main scenarios: actual database leaks from websites, credential stuffing due to password reuse, and local theft by infostealers on compromised devices. The guide recommends starting with the Have I Been Pwned service to check email exposure across published breach datasets and using its separate Pwned Passwords tool to test whether a password itself has been seen in leaks. It stresses that absence from these databases does not guarantee safety and outlines practical next steps when exposure is confirmed, including changing reused passwords, enabling multi-factor authentication, and terminating old sessions. Additional advice covers device hygiene and safe habits such as using a password manager.