What is a well-known password-cracking program?

One of the most well-known password-cracking programs is John the Ripper. John the Ripper is a free password cracking software tool designed to identify weak passwords. It is commonly used by security professionals and hackers to test the strength of passwords and improve overall system security.

John the Ripper uses a variety of techniques such as dictionary attacks, brute force attacks, and rainbow tables to crack passwords. It can handle a variety of password types and hashes, making it a versatile tool for penetration testing and security assessments.

While John the Ripper is a powerful tool for identifying weak passwords, it is important for individuals and organizations to create strong, unique passwords to protect their sensitive information. Using complex passwords with a combination of letters, numbers, and special characters can help safeguard against password cracking attempts.