[messaging] Partial order group chat with partial history visibility

[Jeff Burdges]

On Wed, 2016-05-25 at 14:26 +0200, Ximin Luo wrote:
> Every message-event v embeds references to its predecessors, similar
> to how every message-event v embeds U[v].
> 
> When reading a message-event v, if a particular user u cannot
> read/decrypt one of its predecessors p, they just ignore the edge (p
> <- v), and don't treat it as part of G_u. There's details to be worked
> out for security implications, but they can be worked out and it's not
> relevant to the model.

Ok.  The set of predecessors determines the node.  And nodes originate
from a specific user, so that's well defined.  It's okay of course if I
receive a new node with predecessors that I've never seen.

Jeff


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: This is a digitally signed message part
URL: <http://moderncrypto.org/mail-archive/messaging/attachments/20160525/8c299f32/attachment.sig>