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Sorry, I am not an expert myself, but I think there are some recourses about that in the internet
Or, this file on x.org:
https://www.x.org/wiki/Events/XDC2014/XDC2014DodierPeresSecurity/xorg-talk.pdf
Yeah, to send it naked over the wire would be nuts, which is why everybody uses SSH. But unless there’s insecurity within the computer, that’s a moot point.