OAuth 2.0 Concepts and Principles Learned Through Practice, Hacking, and Security

An introductory course on web hacking for information security beginners and web developers! Start web hacking in a fun way with this course!

The second lecture on SQL Injection, taught by a mock hacking practitioner! The first lecture covered the basics and the core principles of attacks, while the second lecture is about technical advanced attack techniques. Therefore, taking the first lecture is a must!

The ultimate web hacking master! File upload vulnerability attack technique! This is a training that will further improve the students' web hacking skills through a completely different approach from the existing known methods!

The ultimate web hacking! File upload vulnerability attack technique! Part 2 of the 'Part 1' education follows Part 1 and covers more advanced techniques.

SQL Injection, the flower of web hacking, explained by a mock hacking practitioner! Learn attack and defense at the same time.

In this course, you will learn how to create secure web services.

The ultimate web hacking! File upload vulnerability attack technique! Part 2 of the 'Part 1' education follows Part 1 and covers more advanced techniques.

The ultimate web hacking! File upload vulnerability attack technique! Following Part 1, Part 2 '3rd part' education covers more advanced techniques in depth.

The ultimate web hacking! File upload vulnerability attack technique! Part 2 of the '2nd part' education follows Part 1 and covers more advanced techniques.

This lecture covers the king of client attacks, XSS (Cross-Site Scripting). You can systematically learn about the basic concepts of XSS, the attack principles, and most importantly, what process to go through to perform the attack procedure.

Web shell is the core tool for file upload vulnerability attacks! Let's learn how to create a web shell together through this lecture~!

A web hacking course where you can learn, practice, and understand the principles by simply following along with WebGoat problem solving!

Basic understanding of web shells and web shell detection solutions, as well as attack methods and obfuscation techniques for bypassing them!

Easy-to-follow file download vulnerability attack techniques from web hacking beginners to practitioners! File download vulnerability attack techniques and advanced attack techniques used in practice! And how to apply secure coding!

The basic steps to learn SQL injection attacks, the flower of web hacking! This is a lecture on basic SQL grammar!

Introduction to web hacking and mock hacking for those who are new to web hacking and job seekers in related fields

This is a course where you can learn the basics of web technology. You can learn the basics of web technology in a short period of time. If you are interested in studying or getting a job related to the web, you must take this course!

The second lecture on SQL Injection, taught by a mock hacking practitioner! The first lecture covered the basics and the core principles of attacks, while the second lecture is about technical advanced attack techniques. Therefore, taking the first lecture is a must!

An introductory course on web hacking for information security beginners and web developers! Start web hacking in a fun way with this course!

You may already be familiar with OAuth 2.0, having used it for simple logins with accounts like Google or GitHub. Social login is an extension of OAuth 2.0, and its core technology is in the OAuth 2.0 authorization framework. If you understand the principles of OAuth 2.0, you can develop the ability to implement and adjust it appropriately to your needs.

Learn the basic concepts of Spring Security OAuth2, API usage, and internal architecture. In addition, you will learn how to integrate and link OAuth2 Client, OAuth2 Resource Server, and Authorization Server, build your own authorization server, and implement OAuth2 services through it.

Incident response is less about mastering tools and more about knowing what to judge first. Rather than focusing on how to analyze malware, this course explains the realistic thought process of determining **"whether the current situation is an actual incident and what actions to take first."** Using webtoon-based real-world scenarios, we have organized the entire flow of incident response—from identifying signs of intrusion to incident assessment, initial response, containment, and analysis/forensics—in a way that even non-experts can understand. This is not just a collection of fragmented technical explanations; it is a course where you learn the decision-making criteria and response perspectives that practitioners can apply immediately in the field.

This lecture provides a general guide on how to prepare while studying when you want to choose a career in IT security penetration testing, and what questions and answers to prepare for the interview. I will share my experience working as a penetration testing consultant, at large companies, and in the financial sector, and currently running a penetration testing consulting business.

This is a course where you can learn the basics of web technology. You can learn the basics of web technology in a short period of time. If you are interested in studying or getting a job related to the web, you must take this course!

IT services are rapidly transitioning to cloud environments. You will learn security practices from basic virtual infrastructure construction to security threat monitoring and vulnerability diagnosis for each area to secure the Amazon AWS cloud environment.