Information Security Fundamentals: From the Principles of Hacking to Incident Response, Explained Through Illustrations

This is an introductory course designed so that even people encountering information security and personal data protection for the first time can understand the overall flow within an hour. From security concepts to practical methods in daily life, and even the core content of Korea's Personal Information Protection Act (PIPA), only the essential parts are organized in an easy and simple way. Even without security knowledge, after listening, you'll naturally acquire the basics of safely handling personal information in daily life and work.

This course is an essential real-life IT security guide that even non-security majors and general users can follow immediately. It's designed to help you easily and quickly learn only the security practices essential for daily life, from understanding what ransomware is to infection prevention and response methods, smartphone security settings, and practical security configurations for Windows/Mac OS.

From passwords to phishing, ransomware, generative AI, and service security. See how it works in 3D, then wrap up with one thing you can do today.

Through this course, you can study short answer and descriptive questions from past practical exams for the Information Security Engineer.

Hashing, salting, JWT, symmetric and asymmetric keys, and even HTTPS and TLS. The backbone of security that we use every day yet always found vague and unsettling. If we have to face the countless neglected threats and technical debt someday, let’s properly tackle them once and for all this time.

You can effectively study the contents of the Information Security Engineer practical exam questions and obtain the Information Security Engineer practical qualification.

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.

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

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.

Have you heard of information security solutions, but do you know their exact roles and differences? A variety of information security solutions are used by businesses, including firewalls, IDS, IPS, WAF, DLP, and EDR! Precisely understanding the role each one performs, how it works, and in what situations it is used is an important first step toward developing your information security skills. A complete beginner’s guide to information security solutions (systems) that anyone can easily learn! Learn complex security technologies easily and systematically, starting from the basics.

Learn about networks easily, quickly, and engagingly with pictures and videos!

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 carefully selects the core systems that beginners need to know in the vast field of information security. Rather than relying on rigid theory, it uses clear analogies and practical examples to help you intuitively understand how these systems work. With this single course, you can grasp the big picture of information security systems and build practical skills.

Solve 480 past exam questions from 2015–2026 for the two major subjects of the national 9th-grade computer administration exam (General Computer Science and Information Security) through 20-minute CBTs for each subject. The questions and final answers are exactly as released by the Ministry of Personnel Management. Upon submission, your score and whether you failed a subject immediately appear, and every question includes an explanation.

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!

This training will help you understand the world-famous cloud, build your own cloud environment, and strengthen your ability to use it easily.

This course is designed to guide those who have completed the "Mastering Core Network Theory through Memorization: Basic Course" to understand more advanced theories. It covers deeper concepts such as NAT technology, which is the operating principle of internet routers, as well as load balancing system principles and VPN technology principles. The goal of this lecture is also to finish by "memorizing" it all! You can do it!

This course is for those who want to develop packet analysis programs like Wireshark and various network solutions using the Npcap library.