Writeup for Asemoon from CryptoCTF 2025: breaking a custom CRC-style construction over GF(2) to recover a 64-bit secret key.
Writeup for Lowdown from CryptoCTF 2025: forging signatures in a custom scheme by solving a discrete log over GF(256) matrix groups.
Writeup for Mitram from CryptoCTF 2025: recovering the flag from an oil-and-vinegar style multivariate map over GF(256).
