Elngsih (was "")

[Major Variola (ret)]

At 08:28 PM 9/22/03 -0400, Roy M. Silvernail wrote:
>On Monday 22 September 2003 18:39, Thomas Shaddack wrote:
>> Could be the l33t sp3ak next generation for the cases when the
>> communication is monitored by automated tools for keywords. Could
foil
>> both alerting on keywords and keyword searching on intercepted and
stored
>> material (unless the keyword search would look also for all the
possible
>> permutations of the words).

You don't actually think that Folks Who Care use interesting keywords,
do you?
You *at least* use codebooks.  As Dr. Teller wrote, "its a boy".

>No, the channel is better than that.  The true keywords aren't even in
the
>message.

Correct.   The text-stego channel is *much* more subtle.  In fact, it
doesn't even require
the recent perceptual-linguistic fnidnig, fascinating as it may be.

Only some stego binary codes that are translated after recovery, so
>one need not even be as obvious as "Pick up the 2 cases of beer at
Simon's on
>the way home."  Srue, it's obvoius if you try to sutff too much itno
one
>cleratxet, but that would be a rookie mistake.

Folks, you 1. compress 2. encrypt 3. stego, in that order.  You probably
use
an ECC in between 2 & 3; this is vital if Mallory messes with
your spelling [1].  You probably also add misspelling "chaff" just to
make it
harder for the adversary to undo the stego.  (E.g., you're using a keyed

PRNG to determine which words to misspell.  So you misspell others too.
You use your choice of misspellings to encode the cargo.  Maybe have
multiple
misspellings map to 0 or 1.)

Note that its harder to do this in Hebrew, since it has a higher
bit:symbol ratio, thanks to vwl drppng.

The notion of using "bmob" or "hroien" in a message to avoid keyword
nets is just *comical*.  (Note that ammo, beer, and weed cannot be
stego'd this way :-)

Note that these newfangled blog thingss are very good broadcasting (ie,
traffic-analysis resistant)
media, assuming you write something interesting enough to have a
nontrivial audience.  So, more traditionally, are posts to usenet or
lists like this.

[1] In wartime, censors *gisted* letters, tossing out your wordage.

---
"One of these centuries, the brutes, private or public, who believe that
they can rule their betters by force, will learn the lesson of what
happens when brute force encounters mind and force." - Ragnar
Danneskold, from Atlas Shrugged