Thoughts on Security

May include CTF challenge writeups and other miscellaneous topics

Why The Bear Has No Tail (50) - TFC CTF 2025

Cryptography in practice

12 min read · August 31, 2025

2025 · cryptography TFC CTF 2025 Mersenne Twister state recovery · CTFs
Somkracht (200) - WhyCTF 2025

Cryptography in practice

2 min read · August 10, 2025

2025 · cryptography WhyCTF 2025 · CTFs
Vaulted (199) - JustCTF 2023

Cryptography in practice

10 min read · June 5, 2023

2023 · cryptography justCTF2023 · CTFs
Rustberry (201) - JustCTF 2023

Rust ARMv7+ reversing

19 min read · June 5, 2023

2023 · reversing justCTF2023 · CTFs
A neat trick to recover elements in rings with zero divisors

Number Theory

6 min read · September 21, 2022

2022 · cryptography math · CTFs