You are still postulating that there are transmission errors that won't be
caught by either TCP or the underlying physical transport. You need to
make a convincing case that the can happen.
Regards,
Marty
*************************************************************************************
Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown
Hts, NY 10598
914-784-7287; IBM tie line 863-7287
Notes address: Martin W Sachs/Watson/IBM
Internet address: mwsachs @ us.ibm.com
*************************************************************************************
"David Fischer" <> on 09/19/2001 10:43:42 PM
To:
Martin W Sachs/Watson/IBM@IBMUS
cc:
"Dan Weinreb" <>, <>
Subject: RE: T2 Retry with Delivery Receipt
Actually NRR is exactly for making sure that the message arrived intact,
either
as a protection from transmission failures or from security breaches (e.g.
man-in-the-middle attack). It might be pretty bad if I ordered 2 items and
there was a transmission failure and it got changed to 1,000,002 (actually
it
would be more binary than that). The signature assures the To Party that
it did
not change and NRR assures back to the From Party that it did not change
(round
trip).
David Fischer
Drummond Group.
