RotorCrypt X-Files is a free, fully offline encryption tool for Windows. Log in once — everything in your vault is encrypted/decrypted automatically, no per-file passwords. Multi-layer encryption (AES-256-GCM, ChaCha20, rotor cipher) with Argon2id key derivation. Share files securely with one confirmed contact via RCX files, or export as self-extracting EXE with optional expiration. No cloud, no account required.