CS50's Introduction to Cybersecurity is free on two paths. Harvard hosts the full course at cs50.harvard.edu/cybersecurity, with lectures and assignments open to anyone and no login needed. edX carries the same course and adds an optional verified certificate. Our 'Go deeper' button links to the edX listing, and we earn nothing when you enroll there: we are not in edX's affiliate program. This course is built for both technical and non-technical people, so you don't need a coding background to start. Learn it free on Harvard's site, or use edX if you want the certificate. It works well as a primer before deeper, hands-on security training like TryHackMe.
The course covers threats, authentication, networking, and system security across about 30 hours (source: cs50.harvard.edu/cybersecurity).
About This Course
Harvard's introduction to cybersecurity for technical and non-technical audiences. Covers threats, authentication, networking, system security, and operational security. Free to audit; certificate available via edX.
Course Details
Frequently Asked Questions
Is CS50 Cybersecurity free?
Yes. It's free on cs50.harvard.edu/cybersecurity and free to audit on edX. Only the edX certificate costs money.
Do I need a technical background?
No. It's written for both technical and non-technical audiences and explains the concepts from the ground up.
What does it cover?
Common threats, passwords and authentication, network security, system and software security, and everyday operational safety habits.
Harvard's site or edX?
Same course on both. Harvard's site is fully open; edX adds a certificate and progress tracking.
Do you earn anything if I use the 'Go deeper' link?
No. We are not in edX's affiliate program, so that link earns us nothing. Harvard's free version is identical.
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