aes-cbc 3 ECOWAS CTF 2026 — Sankofa [Crypto/300pts] 24/04/2026 ECOWAS CTF 2026 — Dogon Nonce [Crypto/Hard] 24/04/2026 ECOWAS CTF 2026 — Silent Whispers III [Steganography/500pts] 24/04/2026