We're going to implement encryption between php server and python server. We decided to use paragonie/halite library (based on libsodium) on our php part. Python guy are asking what exact protocol from libsodium they should implement. And I don't know what to say them.
What encryption protocol is used by Halite library by default?
What encryption protocol is used by Halite library by default?
Not only is it by default, but it's the only option: XSalsa20.
https://github.com/paragonie/halite/blob/master/doc/Primitives.md