There are an increasing number of data breaches and cyberattacks in which users' personal data and passwords are stolen. Therefore, the need to check the security of one's own passwords is increasing. There is the problem of finding a secure and reliable tool that checks whether personal passwords have appeared in such data breaches. Moreover, it is important that this check is carried out in a way that does not jeopardize the user's privacy by not revealing any sensitive data. Finally, the user needs clear instructions on when and how they should change their password if it has ever been compromised.

The tool Pwned Passwords allows users to check their passwords for data security by accessing a database of half a billion passwords disclosed in data breaches. By entering the password into the tool, it is displayed whether the password was included in previous data leaks. By using a SHA-1 hash function, the entered passwords are encrypted, ensuring the privacy and security of the users. In this way, sensitive data remains protected and private. Moreover, the tool provides clear recommendations for immediate password change if it is identified as compromised. Pwned Passwords offers a secure, reliable, and user-friendly solution for the growing need to control password security in the face of an increasing number of data leaks and cyberattacks. It contributes to raising awareness of cyber security risks and uses techniques that allow the user to protect their digital life without endangering their privacy.