Presence and IntComm WG

[Jeremy George <>]

  These papers might be of interest to some folks on this list.

- Jeremy


---------- Forwarded message ----------
Date: Sat, 04 Dec 2004 13:44:11 -0500
From: Henning Schulzrinne 
<>
To: 
,
 sipping 
<>
Cc: Kundan Singh 
<>,
    Salman Abdul Baset 
<>
Subject: [Sipping] Technical reports on Skype protocol analysis and SIP in
    peer-to-peer mode

We have written two technical reports that might be of interest to members of 
the list. Both can be found at http://www1.cs.columbia.edu/~library/2004.html

    Peer-to-Peer Internet Telephony using SIP
    Kundan Singh and Henning Schulzrinne

describes how SIP, with trivial modifications, can operate as a fully 
peer-to-peer protocol, i.e., without per-domain servers. We describe a hybrid 
scenario where parts are in p2p mode, while others follow the more 
"traditional" proxy mode.

    An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol
    Salman A. Baset and Henning Schulzrinne

attempts to analyze how Skype works, constrained by the encryption of the 
protocol exchanges.

We would appreciate comments on these documents.

Henning

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