CipherStation: Secure Dead-Drop Encryption & Classical Cipher Auto-Cracking - CS50x Final Project

CipherStation v0 🔐 – Secure Dead‑Drop Encryption & Auto‑Cracking Classical Ciphers. A CS50x Final Project by Saadi Agha. WHAT IS IT? ⚡ • All‑in‑one cryptography toolkit: modern AES‑256/ChaCha20 + classical cipher analysis • “Dead‑Drop” relay station: ticket‑based, 24 h self‑destruct, no accounts, no logs • Auto‑detects & cracks Caesar, Vigenère, ROT13, XOR, Atbash, Substitution, and more • Dual interface: Flask web app + full‑power CLI (progress bars, custom wordlists, modes) KEY FEATURES 🗝️ • Modern encryption: AES‑256‑GCM, ChaCha20‑Poly1305, Ed25519 signatures, X25519 ECDH • Hybrid encryption (X25519 + HKDF + AEAD) • Argon2id password KDF • Multi‑metric cryptanalysis engine with confidence scoring • Secure audit logging & key registry • SQLite‑backed dead‑drop with auto‑cleanup 🚀 QUICK START ```bash git clone cd cipherstation && python -m venv venv && source venv/bin/activate pip install -r requirements.txt # Launch web UI cd relaystation && python app.py # OR use the CLI python cli_cracker.py –help