[defrost]

Properly private .. or recoverable via an FOI after the appropriate lapse of time?

Even if not entered into a formal record, properly private, or logged by higher command and saved for X days in case of need for review.

I can believe it's secure from outside hacking, I question whether it's private w/out some form of logging baked in.

[HenryBemis]

Logging: do you include the logging of: your browser, your ISP, your Windows machine, your router, Google (if you are using their browser), Microsoft (if you are using their browser), VPN provider (if you are using VPN), etc.

[defrost]

I primarily include chat logs made by third parties not chatting when discussing the privacy of a chat protocol. Traffic analyis is a secondary concern.