Keygen (key generator) analysis means reverse engineering how a program generates license keys — either to understand weakness in the algorithm or to demonstrate that the licensing scheme is bypassable. This article is focused on Keygen Analysis.

Software cracking means bypassing license/registration checks, trial limitations, or copy protection to assess the security of software protection mechanisms. This is an article/guide on the art of software cracking, cracking software.

John the Ripper is one of the most well-known and widely used password cracking tools in the security world. It's open-source and primarily designed for offline password cracking—taking password hashes and attempting to recover the plaintext passwords through various attack modes. This is a guide on John the Ripper (Password Cracking Tool).