Best Free CS: Systems, Security & Networking Courses & MOOCs

Coursera

University of Colorado System

Introduction to Cybersecurity for Business (Coursera)

Security & Networking

Dive into the essential aspects of computer security with our Introduction to Cybersecurity for Business course. Gain practical insights into safeguarding your company’s data, understanding potential risks, and implementing effective cybersecurity measures. Perfect for business owners, IT staff, and anyone looking to enhance their organization's digital defenses.

Jun 22nd 2026

5-12 Weeks

Security Risk Assessment Information Security

Coursera

University of Colorado System

Cyber Threats and Attack Vectors (Coursera)

Security & Networking

Explore the world of cybersecurity with our 'Cyber Threats and Attack Vectors' course. Uncover how cyber attackers breach systems, exploit vulnerabilities, and compromise data. This course is part of a series on Practical Computer Security and will equip you with essential knowledge to protect your business or personal systems from common threats.

Jun 22nd 2026

5-12 Weeks

Security Cybersecurity Cyber Attacks

Coursera

University of Colorado System

Detecting and Mitigating Cyber Threats and Attacks (Coursera)

Security & Networking

Discover how to prevent data breaches and protect your organization from cyber threats with our 'Detecting and Mitigating Cyber Threats and Attacks' course. This practical guide equips you with the knowledge and skills needed to identify vulnerabilities, utilize security tools effectively, and implement robust defense strategies against potential attacks.

Jun 22nd 2026

5-12 Weeks

Security Cybersecurity Cyber Attacks

Coursera

University of Colorado System

Proactive Computer Security (Coursera)

Security & Networking

Discover the ultimate guide to proactively securing your computer systems in our 'Proactive Computer Security' course. Gain insights into deterring cyber threats, mastering penetration testing methodologies, and safeguarding your data against potential breaches. This is the final course in a specialization designed for those serious about protecting their digital assets.

Jun 22nd 2026

5-12 Weeks

Security Sharing Computer Security

Coursera

University of Colorado System

Design and Analyze Secure Networked Systems (Coursera)

Security & Networking

Discover the essential skills needed to secure networked systems in this expert-led online course. From understanding basic cyber threats to applying advanced risk management techniques, learn how to protect your data and computer systems from potential breaches. This course covers real-world case studies like the OPM data breach, providing practical insights into securing networks effectively.

Jun 22nd 2026

4 Weeks

Security Cybersecurity Security Systems

Coursera

University of Colorado System

Basic Cryptography and Programming with Crypto API (Coursera)

Security & Networking

Dive into the fascinating world of cryptography with our beginner-friendly online course, 'Basic Cryptography and Programming with Crypto API'. This course will equip you with essential knowledge in encryption methods, including mono-alphabetic substitution ciphers, one-time-pad, and quantum key distribution. You'll also explore efficient symmetric key algorithms like DES and AES, understand their applications, and learn how to protect against various attacks.

Jun 22nd 2026

4 Weeks

Programming Cryptography Network Security

Coursera

University of Colorado System

Hacking and Patching (Coursera)

Security & Networking

Discover the secrets of hacking and patching in our expert-led online course. Gain hands-on experience identifying and exploiting command injection vulnerabilities in web apps hosted on AWS Linux instances. Learn to search for valuable information within typical Linux systems and understand how to deposit and hide Trojans for future exploitation. You'll also learn essential skills in securing these applications through input validation using regular expressions, and discover a security design pattern that prevents the introduction of injection vulnerabilities.

Jun 22nd 2026

4 Weeks

Security Attacks Hacking

Coursera

University of Colorado System

Secure Networked System with Firewall and IDS (Coursera)

Security & Networking

Discover how to protect your networked systems with our expert-led course on Firewalls and IDS. From setting up dual-firewall DMZs to mastering the Linux firewall and employing Snort for intrusion detection, this course equips you with the knowledge to safeguard your network against threats.

Jun 22nd 2026

3 Weeks

Network Security Firewalls Fundamentals of Computer Network Security Specialization

Coursera

University of Colorado System

Classical Cryptosystems and Core Concepts (Coursera)

Security & Networking

Discover the basics of cryptographic systems and their critical role in securing digital communications. This course offers a detailed exploration of classical cryptosystems and essential cryptography principles, providing you with a strong foundation to understand modern encryption techniques. Ideal for beginners and professionals alike, this course is designed to meet the growing demand for cybersecurity expertise.

Jun 22nd 2026

3 Weeks

Cryptography Security Networks