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Build in-demand cybersecurity skills with a free course on security management, risk, access control, cryptography and incident response—ideal for career starters.
5
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15 exercises
Boost your cyber security skills with a free online course on system and web protection, network defenses, and real-world attacks—study fast and earn a certificate.
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20 exercises
Build job-ready IT security skills with a free online course: risk management, Linux, networks, incident detection, and Python—plus tips for resumes and interviews.
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Free CourseCompTIA Security course
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Free CourseAdvanced Topics in Cryptography
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22h34m
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Free CourseCyber security
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Free CourseInformation security lessons
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Free CourseIntroduction to Cybersecurity
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Free CourseCyber Security Masterclass
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Free CourseCyber security full course
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Free CourseCyber Security full course
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Free CourseCyber Security
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Free CourseCyber Security For Beginners
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Free CourseApplied Cryptography: AES, RSA, ECC, TLS, Tor and Bitcoin
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Free CourseModern Cryptography for Beginners: Encryption, Hashing, Signatures and Secure Computation
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Free CourseModern Applied Cryptography: AES, RSA, ECC, Hashing and Post-Quantum Basics
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Free CourseFoundations of Cryptography: Symmetric, Public-Key, Hashing and Signatures
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Free CourseSQL Injection Masterclass - Web Security Academy Labs
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Free CourseCyber Security CISSP Exam
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Free CourseCryptography and Network Security
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Threat Modeling for Beginners: How to Think Like an Attacker to Build Safer Systems
Learn threat modeling step by step to identify risks, prioritize threats, and design safer systems with practical cyber security habits.
Security Operations Center (SOC) Fundamentals: How Blue Teams Detect, Triage, and Respond
Learn SOC fundamentals including detection, triage, investigation, and response to build practical cyber security defense skills.
Building a Practical Cyber Security Learning Path: From First Concepts to Hands-On Defense
Learn a practical cyber security learning path from fundamentals to hands-on defense, including hardening, monitoring, and incident response.
An Introduction to Node.js: Building Fast and Efficient Backends
Discover what Node.js is, its key features, and why it’s a top choice for building fast, scalable, and efficient backend applications.
A Beginner’s Guide to Progressive Web Apps: Bridging Native and Web Experiences
Learn how Progressive Web Apps (PWAs) blend web and native features to deliver fast, secure, and offline-capable user experiences across all devices.
Unlocking the Secrets: An Introduction to Digital Forensics in Cyber Security
Digital forensics uncovers digital evidence to solve cybercrimes, supports legal action, and strengthens security, offering growing career opportunities in tech and law enforcement.
The Role of Digital Forensics in Cyber Incident Response
Digital forensics is key in incident response—helping uncover what happened, secure evidence, and support legal action after a cyberattack.
Digital Forensics Tools: Essential Software for Modern Investigations
Explore essential tools used in digital forensics to uncover, preserve, and analyze cyber evidence—key for solving crimes and securing digital environments.
Web Development
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Office Productivity (Excel, Word and More)
Artificial Intelligence and Machine Learning
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Robotics and Drones
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Programming Fundamentals
Developer and IT Tools
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With the increasing importance of protecting digital information, understanding cyber security has never been more critical. We offer 18 free online courses designed to enhance your knowledge and skills in various aspects of cyber security. These courses are ideal for anyone looking to safeguard computer systems, networks, and digital assets from cyber threats.
Our courses cover a broad range of topics including Computer Systems Security, Cyber Security, Information Security Lessons, Cyber Security Full Course, IT Security, Cyber Security Masterclass, Network Penetration Testing Course, Information Security Management Fundamentals, Cryptography, and Network Security.
You will also find advanced topics such as Introduction to Cybersecurity, Advanced Topics in Cryptography, Cyber Security CISSP Exam preparation, and the CompTIA Security Course. Each course is designed to provide practical skills and knowledge that can be applied directly to protect digital information against unauthorized access and cyber threats.
Moreover, upon completion of these courses, you will receive a free certification to validate your newfound skills.
To start learning, you'll need to install the Cursa application on your mobile device. Android users can download the app from the Google Play or at App Store ( Apple ).
In all, there are more than 1000 courses, divided into more than 400 categories in 5 different languages, where we provide the digital certificate for free to everyone.
About
After completing the course you will have free access to the digital certificate of course completion.
How to get it for free: It is only possible to issue the certificate in our application, which can be downloaded from Google Play or App Store, so you can take the online course here and use the app only to issue the certificate. Being that you can also take the courses through the app if you wish.
In digital format: After completing the course and generating the certificate through the application, the image of the same will be generated in the photo gallery of your cell phone and will also be sent to your email.
Why the certificate is important: You can use it to improve your resume, to rise in careers or positions, to enrich your knowledge and among several other applications.
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What are people saying about free online courses of Cyber Security
Anele Mangala
the lessons was very good and understandable thank you
CourseCyber Security Masterclass
Rich Rios
Just finished CS Intro Part 1 — Eli’s teaching style is great and funny. I’ll post another review after a few more sections.
CourseCyber Security
Notheron Clarke
easy to understand and it starts you out slowly
CourseIntroduction to Cybersecurity
Darlene
Thank you I have a daughter Name Candis Shereece Swinney
CourseCompTIA Security course
Shohanur Rahaman
Thanks for classes We can do better.
CourseComputer systems security
kgosi
I gave myself a task tht at the end of the year I will know 50% of this cyber security thing because I’m coming from a divorce of 9 years marriage……….
CourseCyber security
Josephine Serebour
I love this content as it gives me simple understanding to IT Basics.
CourseIT Security
Masooma Batool
X ≡ 2 mod3, 2 mod5, 1 mod11. CRT: moduli 3,5,11 coprime. M=165. Compute: (2×55×1 2×33×2 1×15×3) mod165 = (110 132 45)=287 mod165 = 122. So X=122.
CourseCryptography and Network Security
Masooma Batool
n=3009. √3009≈55. 55²=3025, 3025-3009=16=4². So factors: (55-4)(55 4)=51×59.
CourseCryptography and Network Security
Masooma Batool
GCD(790,121): 790 mod 121 = 64 121 mod 64 = 57 64 mod 57 = 7 57 mod 7 = 1 7 mod 1 = 0 → GCD=1, so relatively prime.
CourseCryptography and Network Security