Understanding Manufacturing Security (OT Security) in the AI Era Through Real-World Cases

We will conduct an in-depth analysis of major domestic security incidents, such as personal information leaks from mobile carriers, the March 20 cyberattack, and the hacking of the Blue House. By examining the causes, damages, and response processes of each incident, we will understand the security threats facing modern organizations and individuals and learn practical prevention and response strategies.

Records remain, and responsibility grows! Everything about digital ethics that protects the workplace This course explores digital hate, digital sex crimes, and the risks of using AI that can actually occur in the workplace through case-based stories, clearly explaining what the problems are and how to prevent and respond to them. It firmly establishes the standards of digital ethics that today’s employees—who communicate digitally and use AI as part of their everyday work—urgently need, including how to work while respecting one another in digital spaces and how to use AI more safely and responsibly.

This course puts an end to operational vulnerabilities in Linux servers caused by incorrect permissions. Completely master file and directory permission control based on real-world practical standards.

We provide a comprehensive guide to understanding information security and privacy issues that may arise when using generative AI, and to establishing a secure AI usage framework based on the AI Basic Act and the latest security strategies.

Why do so many people fall for phishing attacks? In this lecture, we will examine how phishing is designed and executed through real-world attack cases, understand various types including smishing, QR phishing, and corporate-targeted attacks, and summarize prevention and response methods from a practical perspective.

Mastering Threat Mitigation, Custom Rules, and API Protection for Modern DevOps Pipelines

As the adoption of generative AI accelerates, new security threats such as corporate confidential information leaks and prompt injections are surging. This course covers strategies for embedding security throughout the entire AI lifecycle, based on the National Intelligence Service (NIS) guidelines' 30 core security measures and 15 practical threat cases. It also addresses security issues in the latest AI trends, such as Agentic AI and Physical AI, and presents methods for establishing governance frameworks that can be immediately applied in practice.

This course carefully selects the core systems that beginners must know in the vast field of information security. Instead of rigid theory, it's structured to help you intuitively understand system principles through clear analogies and practical examples. With this single course, you can grasp the big picture of information security systems as a whole and develop practical skills.

Many people use Docker, but few understand its underlying principles. Without understanding these principles, you can only rely on searching for answers when problems arise, rather than solving them yourself. The essence of Docker lies in the operating system. This course is not a superficial overview of memorizing a few commands; it delves deep into the inner workings of the operating system that makes up Docker. Once the internal structure becomes visible, Docker is no longer difficult.

Are you curious about how programs run, multiple tasks are processed simultaneously, and data is stored securely? Through 13 lessons, you will systematically learn the core principles of operating systems, including processes and CPU scheduling, memory management, threads and synchronization, and file systems. By connecting concepts you may have previously memorized individually, you can understand how computer systems operate and build a solid foundation of knowledge essential for development.

This lecture is about automotive ECU cyber security based on a basic understanding of cryptography.

This course covers the fundamental concepts of operating systems, one of the core subjects in computer science. Operating systems are essential software for efficient resource management and providing user environments in computer systems, and through this course, learners can systematically understand how operating systems work and what components they consist of. Additionally, by learning the structures and functions of various operating systems, students will master the detailed operating principles of operating systems such as processes, memory management, file systems, and disk management, and can solidly build the foundational knowledge necessary for actual development and system utilization. Through this course, learners will gain a comprehensive understanding of operating systems and will be able to have confidence in advanced computer science learning and practical applications.

As AI systems become agentic and expand beyond text into image, audio, and multimodal capabilities, security threats are becoming significantly more complex. This lecture analyzes the latest security threats and attack techniques faced by AI Agents and Multimodal LLMs, as well as real-world cases, from an AI Red Teaming perspective.

With a good guide, the black terminal window is no longer something to fear. I’ll be your reliable companion as you journey through the world of Linux. ● Beginners with no technical background ● Students majoring in computer engineering or computer science ● Developers who need foundational training ● Those who are intimidated by a black window with white text ● Those who feel overwhelmed about launching a real service Practice environment: WSL / Virtualbox / Ubuntu 24.04 / Rocky 9 An instructor with 26 years of experience will guide you at a beginner-friendly level. One hour a day for one week, and you’ll start to see Linux.

Master AWS networking completely! Learn VPC, subnet, routing, and security with a focus on practical application, and design secure and scalable cloud network architectures. Complete the core skills that every working engineer must know in a short period of time!

If you want to work for a long time as a super developer who can handle the entire process of service development and operations alone, building a solid foundation in IT infrastructure knowledge is just as important as learning various programming languages!

This course is provided for those who have completed the 'Becoming a CS Major by Memorizing Broadly and Shallowly' course to study operating systems in greater depth.

A course where you understand core operating system concepts and train to explain them verbally for interviews.

✅ Out of the entire series (1) ~ (7), (5) operating system, user interface, database ✅ CS101 series lectures - From basic computer theory to the latest practical examples - Provides a wide range of basic knowledge

Now I can analyze the Linux kernel too! The easiest kernel lecture among all Linux kernel courses.