In this chapter, we covered the MD5 and SHA-1 hashing algorithms, the Windows password hashing algorithm, and the Linux password hashing algorithm. In the challenges, you cracked a Windows password hash to recover a plaintext password, and another password hash using an unknown number of MD5 and SHA-1 rounds. Finally, you cracked the Linux password hashes to recover the plaintext password.

In Chapter 3, Strong Encryption, we will cover two main methods of strong encryption, that is, AES and RSA.