Re: Steganography via VoIP...

[Dave Farber <dave () farber net>]

Begin forwarded message:

> From: "David P. Reed" <dpreed () reed com>
> Date: February 16, 2010 9:08:12 PM EST
> To: dave () farber net
> Cc: ip <ip () v2 listbox com>
> Subject: Re: [IP] Re:  Steganography via VoIP...

> Come on.  IEDs are triggered by cellphones purchased off of eBay,  
> and cheapo RC airplane kits sold by the zillions from China.
>
> Only the truly confused would think that steganography over SIP VoIP  
> is some kind of novel and uniquely dangerous thing.
>
> In 1992 as a quick hack, I happened to demonstrate that you can send  
> TCP packets with bad checksums (subtract 1), which provides a near- 
> invisible "covert channel" that penetrates everywhere with very low  
> probability of detection or interception.  This channel is still  
> wide open, and a far better channel than stego-over-VoIP for the  
> same target devices.



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