The protection and security of personal data on the internet is a constant challenge. A major aspect of this is ensuring the strength and security of passwords. In some cases, passwords have been exposed in data breaches, despite all precautions. The problem, therefore, is how to check if one's own password has been compromised in such a data breach. A tool is needed for this purpose, which helps to check the security of one's own password and indicates whether it has ever been exposed in a data breach.

The Pwned Passwords tool offers an effective solution for this problem. It has an extensive database of passwords that have already been disclosed in data breaches. As soon as a user inputs their password into the tool, it is sent through a secure hash function that protects the sensitive data. Then, the password is compared with the passwords stored in the database. If a match is found, the tool informs the user that their password has been compromised. In this way, users can check the security of their password and if necessary, change it immediately, leading to higher data protection. Therefore, Pwned Passwords is an important companion to protect oneself from the consequences of data breaches.