Karl Fogel at
I don't understand how @KeybaseIO can both offer "exploding messages"
(i.e, sender-timed self-destructing messages, as per
https://keybase.io/blog/keybase-exploding-messages) *and* be free
software (#opensource) on the client side. Those two things are
inherently incompatible, right? What am I missing?
Hmmm.. blobs, maybe?
Nope. If the client ever has the plaintext, then the client can just save the plaintext somewhere. If you control the client, then you control that behavior.
Maybe the client never has the plaintext, and that's just displayed inside some proprietary graphical widget that's not proper text.
There's still always the ability to screencapture though xD
This kind of thing is always best-effort. It works unless you change your client so it doesn't work.