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About this blog

Hi, I’m Kevin Liu (leozzmc), and this is where I record my technical learning and hands-on work.

The content here roughly covers:

Security / CTF: CTF writeups (GaianSpace, STARPWN, etc.), penetration-testing and defensive notes
Radio / Space: LoRa, Meshtastic, SDR, satellite communications, and RF signal analysis
Cloud / DevOps: hands-on AWS, Kubernetes, Terraform, CI/CD, and serverless
Algorithms / Problem solving: data-structure notes and LeetCode solutions
Paper reading, and the occasional hiking log

I previously worked as a Cloud Support Engineer at AWS. I enjoy building things, reverse engineering, and turning what I learn into notes. Nearly all the articles on this site are my own first-hand writeups and hands-on records, and I hope they’re useful to people with similar interests.

Contact

GitHub: github.com/leozzmc
Email: zzmczzmczzmc870125@gmail.com

About the content

The code, commands, and technical explanations in the articles are for learning and research purposes only. Please only operate in environments you are legally authorized to use.
The copyright of some images and quoted content on this site belongs to their original authors.
If anything is incorrect or needs correction, feel free to reach out via the methods above.