Anti-Slop CTF 2026 Crypto Writeup: Polynomial Drift + Sealed Signal
Fourth post in the Anti-Slop CTF 2026 series. The web writeup covered HTTP parsers. The reverse writeup covered a quadratic ECDSA nonce and a SHA-256 length extension. The pwn writeup covered a Bellcore CRT fault, a leak-then-overwrite, and a five-stage GCM forge chain. This one walks the two crypto challenges in the same step-by-step format. ...