[messaging] Message delivery and revocation in Pond etc

[Ben Laurie]

On 31 March 2014 20:11, Ximin Luo <infinity0 at pwned.gg> wrote:
> I'm more and more favouring the idea that, in an end-to-end-secure system, you should *not* consider a message "definitely received" by the intended recipients, until you receive an ACK from them that strongly (but perhaps indirectly) refers to the message that you sent. (With email this is a no-no but here we've already authorized the sender.)

+1!

I once had a bug in my XMPP server that caused it to drop ~50% of
messages. It took a surprisingly long time and some rather odd
conversations before anyone noticed.