I am a student studying information security and I prefer a related job. However, I only knew a little about the concept of blockchain and did not really understand it. I did not have confidence in development because I was managing servers. However, after taking the course, I gained confidence in development. Also, it was good that various terms related to blockchain were explained easily. I think the best part was that I was able to experience blockchain using addition directly using various tools. It was a course that showed my love for security, blockchain, and Klaytn. Thank you.