idekCTF 2022* definitely has a fun and inspiring set of cryptography challenges. I played with @blackb6a and we solved 8 of the 10 crypto challenges. In this blog post, I’ll include my solution on three of them: Primonumerophobia (10 solves), Chronophobia (5 solves) and Decidophobia (3 solves). Primonumerophobia Challenge Summary Let $T = \{0, 4, 6, 10, 16, 18, 24, 28, 30, 34, 36, 40, 42, 44, 45\}$. An initial state $(t_0, t_1, …, t_{46})$ with $t_0, t_1, …, t_{46} \in \{0, 1\}$ is gene...
