View and vote on the article here: Digital Paranoia: Let's encrypt everything as a simple white space
Digital Paranoia: Let's encrypt everything as a simple white space| Category | | | Summary | rainface writes:
Description: --+> "I think I'm paranoid" {by Garbage}. :). Well, this
world
is changing pretty fast and becoming something crazy. These times whe |
| | Body | The term steganography
is a
part of encryption science, and is often used when talking about
digital
watermarking (like adding ownership data into a data file). So, to make
the
short story long, let me begin. Steganography is a way to encrypt any
of
your data, that you want to hide, into an existing data (files), like
photos, texts (e-mails), music files (like mp3) and such. There already
are
soft made, some of it works really nice.
The whole idea of
steganography is modifying existing data in such a way, that
modifications
don't really affect the quality of a picture or music file. The easiest
way
for almost undetectable encryption is using small amounts of data (like
short text), binding it to large uncompressed data files, like bmp
picture,
which take a big load of space. At this point, first problems apper.
Changing the certain unnessesary bits in certain uncompressed files may
work
fine, but it's a problem - changing bit's, when using compressed data
files,
like jpg's or mp3's. If you do encrypt bigger amount of data, you need
to
hide, so does come risk for bigger picture distortion or quality loss,
and
so changes are more obvious.
Steganography in our
days
are used to put digital signatures in various docs, images or any other
important data. To hide important data as well. Stories are, that
research
in this field are paid by NSA, CIA and/or Air Force. There are enough
steganography soft online to use. Most of such programs do leave their
own
ditigal traces, so it's easy to detect, thus remove the hidden data
within.
Anyways, steganography brings new possibilities to hide data in an
unexpected places, that are clearly visible, but at the same time -
invisible. It allows to spread certain information and stay almost
undetected, unless someone's truly out to get you.
Interesting soft using
this
technology is : 'snow' - adds white spaces at the end of each line,
hides
information this way. Another -- real fun -- Spam Mimic, author Peter
Wayner. "It encodes your message into -- no kidding -- what looks just
like
your typical, delete-me-now spam message". Sounds interesting. Even
SigInt
(Signal Intelligence) systems don't eat spam, I guess.
For those interested, grab some links and do your own deeper
research :)
:
<a
href="ftp://ftp.funet.fi/pub/crypt/steganography/jpeg-jsteg-v4.diff.gz]JPEG-JSTEG[/url]
'Incodes' JPGs. Source code included!
Mp3Steg - no comments.
<a href = "http://www.demcom.com/en/products.htm] Steganos [/url]-
many
features, encrypts almost any file type, easy to use, least detectable!
:)
<a href = "http://members.xoom.com/wbailer/wbstego/] WbStego [/url]-
hides
data in Html files. Sweet!.
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Written by Capt. rainface @ CA lietus@svara.lt
This tutorial is for educational purposes only.
Computer trespassing is a crime |:)|, you know.
Think before you do anything.
This message is to stay intact with any posting
of this tutorial.
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