Writeup for Super DES from BITSCTF 2026. An easy crypto challenge involving a triple DES implementation vulnerability.
Writeup for #808080 from EHAX CTF 2026. A miscellanious challenge requiring generation of a 5-bit Gray Code sequence to decode a custom Caesar cipher.
Writeup for The Clock from LA CTF 2026. A Crypto challenge involving Diffie-Hellman over a clock group and Pohlig-Hellman attack.
Writeup for Pasty from Nullcon HackIM CTF 2026. A Crypto/Web challenge involving XOR-based signature forgery.
Writeup for Linear Coffee Generator from Daily Alpacahack 2026 #29. A Crypto challenge involving LCG parameter recovery.
Writeup for ToyPQC from Daily Alpacahack 2026 #27. A Hard Crypto challenge involving LWE with small error space vulnerable to brute-force.
Writeup for the SpiralFloat challenge from 0xL4ugh CTF V5. A Hard Crypto challenge involving chaotic map inversion using Interval Arithmetic and Depth-First Search (DFS).
Blockchain challenge involving address collision attack against a Rust-based rollup node using Ed25519 signatures and Blake3 hashing.
Crypto challenge involving Mersenne Twister (MT19937) state recovery (untempering) to predict future dice rolls.
Crypto challenge involving a custom nonlinear filter generator (LFSR) broken via algebraic attack using Z3 solver.
