rtsp-simple-server/docs/2-usage/06-encrypt-the-configuration.md

Encrypt the configuration

The configuration file can be entirely encrypted for security purposes by using the crypto_secretbox function of the NaCL function. An online tool for performing this operation is available here.

After performing the encryption, put the base64-encoded result into the configuration file, and launch the server with the MTX_CONFKEY variable:

MTX_CONFKEY=mykey ./mediamtx