July 15 meeting info posted on website

Mon Jun 28 00:07:58 PDT 2004

[Formal announcement due July 1, this is pre-announce and reassurance
that yes, meeting is on and speaker lined up!]

Through a Sniffer Darkly:  Covert Communications Channels

Mark C. Langston
SETI Institute

Today's networks provide unprecedented freedom to communicate.  With
this freedom comes responsibility, and the means to detect, shape, and
control communications have become a necessary part of systems
administration.

We'll briefly examine the two primary means of controlling network
communications today -- firewalls and intrusion detection systems -- and
survey various techniques of evading these tools.  We'll discuss
port-knocking, data hiding, steganography, and other techniques, leading
up to a demonstration of Sifr's Obfuscator, running code that builds on
ideas such as Ron Rivest's Chaffing and Winnowing technique and
data-hiding methods demonstrated by Simple Nomad's NCovert tool.
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Strata Rose Chalup [KF6NBZ]                      strata "@" virtual.net
VirtualNet Consulting                            http://www.virtual.net/
  ** Project Management & Architecture for ISP/ASP Systems Integration **
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