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Re: Detecting covert data channels?

Subject: Re: Detecting covert data channels?
Date: 8 Jul 2007 09:05:33 -0000
 
If the data is encoded in the header then it might be very difficult the check 
the presence of covert channels. www.2factor.us/tunnel.html has  discussed and 
implemented such kind of system where in malicious covert channel is 
established by the unused header fields and the channel is encrypted.

 One of the solution (discussed at www.2factor.us/tunnel) for the IPS can be to 
normalize or enforce policies in the unused header fields. This can prevent the 
malicious covert channel. 

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