Re: CDL Challenge

Jean-Jacques Dubray wrote:

>Non-repudiation is not equal to state alignment. 
>  
>
<AWT>
This is true but if the Sender/originator receives data message which 
contains the Indended Addressee:s signature the Sender knows that the 
Indended Addressee got the message and both parties are certain to a 
(resonable) degree that the other party has the same information.
I.e "state-alignment' i a broader sense.

IMO: 'state-alignment', shared business knowledge is a matter 
probabillity and cost. The higher probalility the more complex protocol 
must be implemented. I many (most business) cases parties are satisfied 
with a Receipt. Partly because its easy to understandand and partly to 
that most software can support request-response.

One should also realise that non-repudiation is characteristic that 
could be associated with, attributed to a data message. In reality any 
"lowlevel" message that contains a reference to the data message and a 
signature could be used in a dispute to claim that the indended 
addressee cannot (trustworthy)  repudiate that the data message reached 
the indended addressee.
<AWT>