Secure messaging without smartphones. Native SimpleX Protocol implementation in C for embedded systems. Features Hardware Abstraction Layer supporting multiple MCU platforms, hardware security modules, and three device tiers from maker-friendly to state-level protection.
cryptography privacy microcontroller esp32 stm32 simplex embedded-systems end-to-end-encryption x3dh hardware-security secure-element double-ratchet secure-messaging simplex-protocol
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Updated
Feb 25, 2026 - C