[Standards] [XEP-0334] message processing hints: is it possible the hint for the server and/or the destinee

Goffi goffi at goffi.org
Sat Feb 4 16:21:41 UTC 2017


Hello,

message processing hints allows to indicate that we wish a message not to be 
stored in archive. The common use case is end 2 end encryption were there is 
no sense for a server to keep it in archives.

But it's not clear if the hint is for the server or the destinee.

For instance, if Juliet doesn't trust her server or Romeo's server, she talk 
to Romeo using whatever e2e encryption method, so she uses either no-store or 
no-permanent-store hint to tell her server not to keep garbage data, but she 
is fine that's Romeo's device keep history of the discussion.

But now Juliet want to send a password to Romeo, and she want to tell to 
Romeo's client not to store the decypted message with the password, in order 
to avoid anybody to read it in history if the device is stoled or whatever.


Is there a way to tell to server not to store the message, but to destinee's 
device that it can store it, and to tell to server and destinee's device not 
to store anything?

Thanks
Goffi


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