My name is Wu Ka Lok, Cousin (also known as Cosine, usin, …). I am a first-year MPhil student in the Department of Information Engineering at the Chinese University of Hong Kong (CUHK), under the supervision of Prof. Sze Yiu Chau. Before that, I was an undergraduate majoring in Mathematics (Pure Mathematics (Advanced)) and Computer Science at the Hong Kong University of Science and Technology (HKUST).

I am interested in cybersecurity, especially (applied) cryptography, and like to play capture the flag (CTF) games. I previously played with and trained the academic team Firebird of HKUST and was one of the captains in 2020-2021. Currently, I am the coordinator of Open Innovation Lab (OIL) in CUHK, where I am responsible for the management, holding events, and giving CTF training as well. I also play CTF with the Black Bauhinia (blackb6a) CTF team based in Hong Kong.