[Volume 1] Theory

PART 01 SYSTEM SECURITY
SECTION 01 Scope and Understanding of Information Systems
SECTION 02 Operating System Structure
SECTION 03 System Security Threats and Attack Techniques
SECTION 04 Prevention and Response to System Security Threats and Attacks

PART 02 NETWORK SECURITY
SECTION 01 Network General
SECTION 02 Network Utilization (TCP/IP Structure)
SECTION 03 Understanding and Responding to Network-Based Attacks
SECTION 04 Network Security Technology
SECTION 05 Network Threats and Response Technologies

PART 03 Application Security
SECTION 01 Internet Application Security
SECTION 02 Database Security
SECTION 03 E-Commerce Security
SECTION 04 Security Vulnerabilities and Development Security

PART 04 General Information Security
SECTION 01 Security Element Technology
SECTION 02 ACCESS CONTROL
SECTION 03 Electronic Signature
SECTION 04 Cryptography

PART 05 Information Security Management and Law
SECTION 01 Information Security Management
SECTION 02 Ethics and Laws Related to Information Protection

[Volume 2] Written Exam Questions

PART 06 Written Exam Latest Questions
Latest Exam Questions 01 (June 2025)
Latest Exam Questions 2 (March 2025)
Latest Exam Questions for the 3rd Exam (September 2024)
Latest Exam Questions for the 4th Exam (June 2024)
Latest Exam Questions for the 5th Exam (March 2024)

[Volume 3] Practical Exam Questions

PART 07 Short Answer Practice Questions
Short Answer Practice Problem 01
Short Answer Practice Problem 2
Short Answer Practice Problem 3
Short Answer Practice Problem 4
Short Answer Practice Problem 05

PART 08 NETWORK SECURITY
Latest Exam Questions 01 (July 2025)
Latest Exam Questions 2 (April 2025)
Latest Exam Questions for the 3rd Exam (November 2024)
Latest Exam Questions for the 4th Exam (July 2024)
Latest Exam Questions for the 5th Exam (April 2024)

PART 09 APPENDIX
Security Mind Map in One Room
Personal Information Protection Act Mind Map
Personal Information Protection Commission Notice

[Purchase Certification PDF] Another Miraculous Passing Materials Collection

- Reflecting the latest exam questions from 2025

〈2026 Selfish Information Security Engineer Written + Practical All-in-One〉 includes two sets of the latest written exam questions and two sets of practical exam questions.
You can grasp the trends and flow of exam questions at a glance and acquire a sense of the actual exam through the latest past exam questions.
Explanations and answers are placed under the questions, allowing you to quickly and efficiently check the correct answer and practice solving problems.


- Video solutions to past exam questions provided

We provide free video lectures on solutions to both written and practical exam questions.
You can view the exam questions by scanning the QR code at the top of each question.
You can also watch video lectures on the [Free Video] bulletin board of the Selfish website after verification.


- CBT online problem book

We provide a CBT online problem book service so that you can solve a large number of past exam questions in one place.
You can practice in the same way as in the actual exam environment.
Enjoy the service anytime, anywhere, using your PC or mobile device of choice.


- Use of the Miraculous Passing Materials Collection

We will give away a 'Miracle Passing Materials Collection' to those who have verified their book purchase.
We provide a variety of materials to help you pass the exam, including a sketch of the exam room, 108 key terms, and past exam questions, so be sure to check them out.
You can check how to participate in the 'Selfish Study Cafe' 〉 Event Bulletin Board 〉 Purchase Verification Event.
Igijeok is rooting for your success!