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[FYI] (Fwd) Interesting new covert channel

------- Forwarded message follows -------
Date sent:      	Thu, 11 May 2000 08:03:37 +0530
To:             	cryptography@c2.net
From:           	Udhay Shankar N <udhay@pobox.com>
Subject:        	Interesting new covert channel


The TCP/IP protocol suite has a number of weaknesses that allow an
attacker to leverage techniques in the form of covert channels to
surreptitiously pass data in otherwise benign packets. This paper
attempts to illustrate these weaknesses in both theoretical and
practical examples.

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