Understanding the Structure of Information Security Systems (Solutions) (Beginner's Guide)

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

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.

Victims of various financial fraud incidents, such as voice phishing, malicious URLs, mobile scams, account and card misuse, internet banking fraud, and ARS authentication scams, are on the rise. Recently, hacking and fraud techniques have become more sophisticated, exploiting vulnerabilities in open banking, simple payment services (Pay), enhanced scam methods, hackers' use of leaked personal information, and the takeover of personal PCs and mobile devices. Financial authorities and various financial institutions do not specifically disclose the procedures of these incidents or the hacking methods used to financial consumers. Having received reports from those around me about the growing misunderstandings among people who have never experienced hacking, I recognized the seriousness of the situation and produced this educational material. I sincerely hope you gain an accurate understanding of hacking, comprehend the relevant laws and policies, and properly establish proactive prevention systems and strengthen response measures. (Under current law, you are responsible for any incidents that occur.)

KCA Information Security Risk Manager (ISRM) certification course! The cornerstone for acquiring the top 3 personal information protection certifications: CPPG, ISMS-P!

As the leakage of linkage information occurred and became known, measures such as evaluating the importance and management status of CI (Connecting Information) were implemented. Accordingly, specialized training is being conducted.

This is a lecture on subnetting, which is necessary when creating or reading network diagrams.

This course is a foundational learning program that covers Introduction to Information and Communication Technology, one of the core theories in computer engineering. Through this course, learners can understand the basic structure and operating principles of computers, and learn the principles and applications of information and communication technology based on this foundation. The course is structured to provide comprehensive learning from the processes of information generation, transmission, processing, and storage to data communication methods in network and internet environments. In addition to the basic concepts of information and communication technology, by understanding the trends and roles of information and communication technology utilized in real life and across industries, this course provides a solid theoretical foundation for learners who are first entering the fields of computer engineering and information and communication technology. 👉 By taking this course, learners can build a fundamental foundation in information and communication technology that encompasses computers and networks, and further utilize it for advanced learning or preparation for related certifications.

This is the "Network Model" episode, the first step of the basic network lecture series that you can learn even if you don't know the first thing about networks.

For those who know network theory but have difficulty actually building one, we will teach you the basic methods for building and configuring a network.

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

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

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

This is Part 1 of a roadmap course that neatly organizes, in a short amount of time, the essential computer science (CS) knowledge you need to excel at development and data. This course has also been used for years as an in-house course at top companies in Korea. Based on 20 years of experience in the field, ranging from systems software to web and app development and data science, this course systematically and thoroughly covers the core concepts you need to excel at development and data—while keeping them easy to understand.

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

This is a hands-on introductory course for AWS cloud beginners that follows and learns basic AWS cloud network knowledge.

This is a course where you create a mini RPG 2D game to learn 2D development techniques, and then learn the process of converting the completed game into a network game by transitioning it to Netcode for GameObject. It covers various essential tilemap functions for 2D games, and is designed to naturally help you learn clean code writing techniques that adhere to SOLID principles. Additionally, this is a lecture that builds the foundation for network games using the updated Netcode API in the latest Unity 6 version.

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.

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

We have gathered all the essential network theories that those planning to operate services in an AWS environment must know. Through this course, you can understand the principles of how AWS VPC (Virtual Private Cloud), composed of private networks using Private IPs, works and gain a detailed understanding of the roles of services such as ALB and NLB.

Let's leverage AWS's key networking services to build everything from simple, basic networks to multi and hybrid networks, understand traffic flow in the architecture, and develop the skills and confidence to implement real cloud networks ourselves.