Multiplex several framed protocols (OTA, crash-dump, CAN bridge, app control, ...) over one byte stream: parses the stream_frame codec once and routes each frame to a per-module handler by the frame's module byte
Tiny dependency-free wire-framing codec: CRC-32 length-delimited typed frames with an incremental, resynchronizing StreamParser for carrying messages over any raw byte stream (USB/CDC/socket/UART)
libsrtp (Cisco) wrapper for ESP-IDF — mbedTLS crypto backend with AES-GCM + AES-CM + HMAC-SHA1. SRTP/SRTCP packet protection for WebRTC and other RTP-based protocols.