Security White Paper on Secure Messaging/Chat solutions

I’m looking for a white paper on the security level employed on the secure messaging channel. I need to get some information for audit and compliance evaluation purposes of potential solutions I’m looking at and it doesn’t seem to be readily available on the website. Does anyone know if such a paper exists, or where I might find it?



I have sent you an email regarding this since the security document cannot be shared over this public forum.