Google CTF 2024 (I): Blinders
This is yet another edition of Google CTF, where I wrote some crypto challenges with my colleagues. I contributed on three challenges this time, namely, Blinders, ZKPOK and IDEA. There are respectively 56, 3 and 4 solves (out of 267 teams scoring non-zero flags) during the contest period. Blinders is one of the challenges I coauthored, which introduces a protocol for private set membership.
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Intigriti's XSS Challenge (February 2024)
I came across with @intigriti’s XSS challenge this month. This time we are given a love letter storage system which allow us to show our love to our hacking buddies.
Read More →TetCTF 2024: adapt
TetCTF comes back with their great crypto challenges. I played with @blackb6a and we ended up securing the 🥉 third place. In this blog post, I will walk through adapt, a challenge which required us to make fake proofs in an IAVL tree implementation. There are only three solves during the contest period.
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HKCERT CTF 2023 Postmortem (III): The Remaining Challenges
We will finally cover the non-crypto challenges that I wrote for HKCERT CTF 2023. This includes one misc (Hackforces), two pwn (ISA Jump Scare & ISA Jogger) and two reverse (The Flag Game & Loot and Scoot) challenges.
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HKCERT CTF 2023 Postmortem (II): Harder Crypto Challenges
In the second part of the series, I will cover four cryptography challenges: baDES, Maybe Someday, Cipher Bridging Service and RSA Triooo. Interestingly, most of them are somehow "plagiarized" from the other CTFs.
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