MeshCipher

A privacy-focused encrypted messaging app for Android with five independent transport layers including Bluetooth mesh, WiFi Direct, and Tor hidden services for serverless and anonymous communication.

Features End-to-End Encryption - Signal Protocol (X3DH + Double Ratchet) for all messages Five Transport Modes - Direct relay, Tor relay, WiFi Direct, Bluetooth mesh, P2P Tor hidden services Smart Mode - Automatic transport selection based on network conditions and availability Real-Time Messaging - WebSocket push delivery with automatic fallback to polling Secure Media Sharing - Images, video, and voice messages encrypted with AES-256-GCM in transit and at rest EXIF Metadata Stripping - GPS, timestamps, device info automatically removed from all outgoing images Hardware-Bound Identity - Ed25519 keys stored in Android Keystore (TEE/StrongBox) Offline Messaging - Bluetooth mesh and WiFi Direct work without any internet Anonymous Messaging - P2P Tor mode uses .onion hidden services with no relay server Disappearing Messages - Configurable auto-delete (on close, 5min, 1hr, 24hr, 7d, 30d) QR Code Contact Exchange - In-person key verification Safety Numbers - Automatic key-rotation detection with 120-digit verified fingerprints Encrypted Database - SQLCipher (AES-256) for all local data Persistent Encrypted Sessions - Signal Protocol state survives app restarts, encrypted at rest Desktop Companion - Compose Desktop client (Linux/Windows) linkable via QR code

Transport Modes Mode Network Range Speed Privacy Server Required Direct HTTPS Global Fast IP visible to relay Yes Tor Relay HTTPS via Tor Global Medium IP hidden from relay Yes (+ Orbot) WiFi Direct WiFi P2P ~100m Fast No network trace No Bluetooth Mesh BLE ~30-100m/hop Low No network trace No P2P Tor Tor hidden services Global Medium Fully anonymous No (+ embedded Tor) All transports deliver the same Signal Protocol-encrypted payload. The encryption layer is independent of the transport layer.