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

Coursera

University of Colorado System

Cryptographic Hash and Integrity Protection (Coursera)

Security & Networking

This comprehensive online course delves into the critical concepts of cryptographic hash functions, MACs, and digital signatures. Learn how these techniques protect data integrity and authenticate messages securely. Whether you're new to cybersecurity or looking to deepen your expertise, this course provides a solid foundation in ensuring the reliability and trustworthiness of digital communications.

Jun 22nd 2026

4 Weeks

Cryptography Computer Security Applied Cryptography Specialization

Coursera

University of Colorado System

Cryptography and Information Theory (Coursera)

Security & Networking

Dive into the intriguing world where cryptography meets information theory in this enlightening online course. Uncover the secrets behind secure communication, understand the science of data encryption, and explore how information is coded and transferred. This course offers a unique perspective on protecting information from unauthorized access and provides insights into entropy, attacker capabilities, and more.

Jun 22nd 2026

4 Weeks

Cryptography Networks Information Theory

Coursera

New York University

Introduction to Cyber Attacks (Coursera)

Security & Networking

Get a solid foundation in understanding cyber threats with our 'Introduction to Cyber Attacks' course. Explore common vulnerabilities, learn how simple attacks are constructed, and study real-life examples of network attacks like DDOS and botnets. Perfect for beginners looking to understand the basics of cybersecurity.

Jun 22nd 2026

4 Weeks

Risk Analysis Risk Assessment Information Security

Coursera

New York University

Cyber Attack Countermeasures (Coursera)

Security & Networking

Discover essential strategies for safeguarding your digital assets with 'Cyber Attack Countermeasures'. This course provides a strong foundation in cyber defense, starting with foundational models and moving into practical applications of authentication protocols such as RSA SecureID and Kerberos. Whether you're new to cybersecurity or looking to enhance your expertise, this course will equip you with the knowledge needed to protect against potential threats.

Jun 22nd 2026

4 Weeks

Cryptography Cybersecurity Cyber Attacks

Coursera

New York University

Real-Time Cyber Threat Detection and Mitigation (Coursera)

Security & Networking

Dive into the world of cybersecurity with our Real-Time Cyber Threat Detection and Mitigation course. This expert-led program will equip you with the knowledge and skills needed to protect enterprise assets from cyber threats in real-time. Explore TCP/IP protocol suites, understand basic security hacks, and learn how to configure firewall solutions effectively.

Jun 22nd 2026

4 Weeks

Security TCP/IP Cybersecurity

Coursera

New York University

Enterprise and Infrastructure Security (Coursera)

Security & Networking

Dive into the world of enterprise and infrastructure security with this comprehensive online course. Gain insights into modern cybersecurity practices, understand compliance frameworks like NIST and PCI, and explore how hybrid cloud architectures can enhance your network's security. Perfect for professionals looking to fortify their organization's digital defenses.

Jun 22nd 2026

4 Weeks

Security Enterprise Cybersecurity

Coursera

Google

Operating Systems and You: Becoming a Power User (Coursera)

Security & Networking

Unlock the potential of major operating systems like Windows and Linux with our 'Operating Systems and You: Becoming a Power User' course. This hands-on learning experience will equip you with the knowledge and practical skills needed to manage, configure, and optimize these critical components of information technology. Whether you're new to IT or looking to advance your current skill set, this course offers an engaging blend of video lectures, demonstrations, and interactive practice sessions.

Jun 22nd 2026

5-12 Weeks

Operating Systems Windows Linux

Coursera

Google

Technical Support Fundamentals (Coursera)

Security & Networking

Dive into the world of IT with our introductory course on Technical Support Fundamentals. Whether you're new to technology or looking to refine your skills, this course provides a comprehensive overview of essential topics including computer hardware, software, Internet basics, troubleshooting techniques, and effective customer service strategies. Prepare for an entry-level role as an IT support specialist by mastering the fundamentals.

Jun 22nd 2026

5-12 Weeks

Software Hardware Internet

Coursera

Google

IT Security: Defense against the digital dark arts (Coursera)

Security & Networking

Discover essential IT security principles with 'IT Security: Defense against the digital dark arts'. This course equips you with knowledge on encryption, authentication, authorization, and network security solutions to protect your digital assets effectively. Dive into a multi-layered approach to cybersecurity and cultivate a culture of security within your organization.

Jun 22nd 2026

5-12 Weeks

Security Networks Information Technology