MOCSCTF 2023 Postmortem

MOCSCTF 2023 Postmortem

I prepared three challenges on behalf of @blackb6a for MOCSCTF, which is a 8-hour long CTF happened yesterday. This blogpost serves as the write-up for the three challenges that I wrote.

There are two solves (out of 40 participants) for Three-pass, and zero solves for jav-asr-ipt and Catch-22 Mini.

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Firebird Internal CTF 2023 Writeup

Firebird Internal CTF 2023 Writeup

Like in 2021 and 2022, I contributed some challenges for Firebird’s internal CTF, which are from the Hong Kong University of Science and Technology. This time I wrote three crypto challenges: Randomsum, Shelter and Threerider.

There were 24 teams participating. There were three solves for Randomsum, while Shelter and Threerider were unsolved during the CTF.

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Retrospective 2022

Retrospective 2022
2022 is a life-changer for me. There were some tough decisions and a few surprises.
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HKCERT CTF 2022 Postmortem (III): The Remaining Challenges

HKCERT CTF 2022 Postmortem (III): The Remaining Challenges
In the last part, I will include the two non-crypto challenges I wrote for HKCERT CTF 2022: Numbers go brrr and Minecraft geoguessr.
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HKCERT CTF 2022 Postmortem (II): Harder Crypto Challenges

HKCERT CTF 2022 Postmortem (II): Harder Crypto Challenges
We will continue walking through the remaining crypto challenges I wrote for HKCERT CTF 2022: Mystiz can’t code, Slow keystream and King of Rock, Paper, Scissors.
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