A password cracker is a tool or software designed to recover or bypass passwords by exploiting vulnerabilities in security systems. These tools can use various methods, such as brute force attacks, where they systematically try every possible combination of characters until the correct password is found. Other techniques include dictionary attacks, which use a list of common passwords and phrases. While password crackers can be used for legitimate purposes, such as recovering lost passwords, they are often associated with malicious activities. Cybercriminals may use them to gain unauthorized access to accounts, compromising the security of individuals and organizations. Proper security measures, like strong passwords and two-factor authentication, can help protect against these threats.