Cybrary.it - Cyber Security Training

Cybrary is a free and open source, online information technology (IT) and cyber security training environment. Which means they teach you cool stuff


You can learn almost anything IT and security related for free, like:

• Systems Administration
• Network Administration
• Cyber Security

Their free IT training classes include everything from industry certifications such as Certified Ethical Hacker, CISSP and CCNA to advanced niche skill sets like advanced penetration testing and cloud administration.They got cool stuff like instructional lectures, interactive lab demonstrations, exam study guides, white papers, case studies and more.

Check this cryptography course for a small example