[IgorPartola]

Yeah I mean clients that auto-delete messages are a very useful tool in communicating between people. It’s that they aren’t really meant for anything actually sensitive because (regardless of if they have E2E or not) they can’t guarantee that someone isn’t archiving or exporting the messages. It is the wrong mechanic for anything sensitive.

If you want to make sure nothing is ever archived, there is no software-only solution. If you control the hardware, in theory you can mandate that everything from the OS level-up is a reproducible build and you know for a fact that the messaging client does not allow any export feature. But also, you still have the problem of someone taking a picture of the screen. The real way to do this would be to control the software, hardware, and environment, aka a SCIF. If you want me to see classified war plans, confiscate all my electronics then show me what I need to see in a controlled environment where I can’t make copies. Messaging apps just simply can’t do any of that.