[OTR-users] [OTR-dev] otr dh key encryption

[Ileana]

On Tue, 19 Feb 2013 20:35:09 +0100
Kjell Braden <kb at pentabarf.de> wrote:

>   3. Frequently (from the top of my head, I think this is on each 
> message) a new session key will be exchanged and the keys used for 
> encryption and the keys used for MACs are renewed. The old keys used
> for the MACs will be revealed to everyone. This is the function that 
> provides the deniability, because at this point in time, anyone can 
> forge messages that would've been valid earlier.

Revealed to *everyone*, or just revealed to the person you are chatting
with?  If they were revealed to everyone, couldn't anyone decrypt the
communications?