[Standards] Disappearing timers for OMEMO proposal

Jonas Wielicki jonas at wielicki.name
Sun May 13 10:38:03 UTC 2018


On Samstag, 12. Mai 2018 19:55:52 CEST Paul Schaub wrote:
> Hi!
> 
> I get what you want to achieve, but I think it would be easier to define
> disappearing messages for general XMPP (not only OMEMO).
> 
> As already stated, you cannot trust devices that announce support, to
> actually delete messages after the timer expired. Lets assume you do
> trust all involved devices. Lets see how to deal with legacy devices.
> Why not specify ephemeral messages like this:
> 
> <message blabla="...">
>     <timer secs="300">
>         <body xmlns="jabber:client">This is an ephemeral message</body>
>     </timer>
> </message>

This is awful. It will require the message to carry a non-empty <body/> to 
deal with the MAM/Carbons mess (and also to help users of clients which do not 
support this feature).

In addition, this breaks all XEPs which depend on the <body/>, like References 
and 394.

kind regards,
Jonas
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