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