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Abstract and history


For years, people have devised different techniques for encrypting data while others have attempted to breakthese encrypted codes. For our project we decided to put our wealth of DSP knowledge to use in the art of steganography. Steganographyis a technique that allows one to hide binary data within an image while adding few noticeable changes. Technological advancementsover the past decade or so have brought terms like“mp3,”“jpeg,”and“mpeg”into our everyday vocabulary. These lossy compression techniques lend themselves perfectly for hiding data. We havechosen this project because it gives a chance to study several various aspects of DSP. First, we devised our own compressiontechnique which we loosely based off jpeg. There have been many steganographic techniques created so far, which compelled us tocreate two of our own strategies for hiding data in the images we compress. Our first method, zero hiding, adds the binary data intothe DCT coefficients dropped in compression. Our other method, which we called bit-o-steg, uses a key to change the values ofcoefficients that remain after compression. Finally, we had to find ways to analyze the success of our data hiding strategies, sothrough our research we found both DSP and statistical methods to qualitatively measure our work.

A brief history of steganography

Steganography, or“hidden writing”can be traced back to 440 BC in ancient Greece. Often they would write amessage on a wooden panel, cover it in wax, and then write a message on the wax. These wax tablets were already used as writingutensils, so the hiding of a message in a commonly used device draws very little suspicion. In addition to use by the Greeks, thepractice of steganography was utilized by spies in World War II. There were even rumors that terrorists made use of steganographyearly in 2001 to plan the attacks of September 11

Questions & Answers

What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Elec 301 - steganography - what's in your picture?. OpenStax CNX. Dec 14, 2005 Download for free at http://cnx.org/content/col10316/1.2
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