Free Udemy Course 2025: Password Cracking & Cryptography: John the Ripper & Hashcat

Unlock the world of cryptography and password security with this comprehensive course on ethical password cracking. Designed for beginners and professionals alike, this program blends theory and practice to help you understand how passwords are stored, protected, and attacked - and most importantly, how to defend against these threats.We begin with the foundations of cryptography and password theory, exploring how different hashing algorithms work and why some are more secure than others. From there, you’ll gain hands-on experience with industry-standard tools like John the Ripper and Hashcat, learning how to set up environments on Windows, Linux, and macOS.You will also discover how to build and customize cracking rules, generate effective wordlists, and apply open-source intelligence (OSINT) to strengthen your password security strategies. Dedicated sections cover Windows SAM, SYSTEM, and SECURITY hives, showing you how attackers extract and analyze hashes — knowledge that will help you anticipate and defend against real-world techniques.By the end of the course, you’ll have a solid grasp of ethical password auditing and the role cryptography plays in modern cybersecurity. Whether you’re an IT professional, a system administrator, or an aspiring ethical hacker, this course gives you the tools to recognize weaknesses and reinforce digital defenses.Take the next step in your cybersecurity journey and gain practical skills that are in high demand across the IT industry.