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Steganography Ppt

Nov 18, 2014

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Steganography

B Y: K ira n G . K . 1 v k 0 6 e c0 3 0

Introduction : Advance security is not maintained by the password protection but it is gained by hiding the existence of the data, which can only be done by Steganography. Steganography is a subject which is rarely touched upon by most IT Security Enthusiasts . Steganographic Systems can hide messages inside of Digital Objects such as a file that has been concealed inside a Digital Picture, Video or Audio file. The main advantage of Steganography is, it hides the information in such a way that there is no information hidden at all. This is derived from the

name of

lizard Stegosaurs.

History of Steganography :4 4 0 B . C . Histiaeus shaved the head of his most trusted slave

and tattooed it with a message which disappeared after the hair had regrown. To instigate a revolt against Persians.

1 st and 2 nd World Wars German spies used invisible ink to print very small

dots on letters. Microdots Blocks of text or images scaled down to the size of a regular dot.

Current Special inks are used to write a hidden messages

on bank notes.

Evolution :

Etymology :It comes from the Greek words :

Definition :

Steganography is the art and science of hiding the fact that communication is taking place.

What is Steganography ?

Steganography is the practice of hiding private or sensitive information within something that appears to be nothing out of the usual.

Steganography in the modern day sense of the word usually refers to information or a file that has been concealed inside a digital Picture, Video or Audio file.

Steganography termsCarrier or Cover File A Original message or a file in which hidden information will be stored inside of it . Stego - Medium The medium in which the information is hidden. Embedded or Payload The information which is to be hidden or concealed. Steganalysis The process of detecting hidden information inside a file.

Types of SteganographyS te g a n o g ra p h y In Te x t/ D o cu m e n ts Steganography In Images Steganography In Audio Steganography In Video

Steganography in TextLi e S h i C o d i g : Li e s a re ve rti l y sh i d n ft n n ca l fte W o rd S h i C o d i g : C o d e w o rd s a re H o ri n ta l y ft n zo l sh i d fte Fe a tu re C o d i g : C o d i g d o n e u si g ce rta i text n n n n fe a tu re s A l rn a ti M e th o d s te ve S yn ta cti M e th o d s c S e m a n ti M e th o d s c

Tools :- wbStego

Steganography In ImagesLe a st S i n i ca n t B i I se rti n g fi t n o

C o m m o n a n d S i p l A p p ro a ch m e M a ski g a n d Fi te ri g n l n M a rk a n i a g e i a m a n n e r si i a r to p a p e r m n m l w a te rm a rks A l o ri m s a n d Tra n sfo rm a ti n s g th o D CT FFT W a ve l t Tra n sfo rm e

Tools :- JPHide and JPSeek

Steganography In AudioLow bit encoding method is used to hide information inside audio files which is some what similar to LSB that is generally used in Images. Spread Spectrum is another method used to conceal information inside of an audio file. This method works by adding random noises to the signal the information is conceal inside a carrier and spread across the frequency spectrum.

Steganography In AudioEcho Data Hiding is yet another method of hiding information inside an audio file. This method uses the echoes in sound files in order to try and hide information. By simply adding extra sound to an echo inside an audio file, information can be concealed. The thing that makes this method of concealing information inside of audio files better than other methods is that it can actually improve the sound of the audio inside an audio file.

Tools :- mp3stego

Steganography in VideosS te g a n o g ra p h y i V i e o s i si i a r to th a t o f n d s m l S te g a n o g ra p h y i I a g e s, a p a rt fro m n m i fo rm a ti n i h i d e n i e a ch fra m e o f vi e o . n o s d n d W h e n o n l a sm a l m o u n t o f i fo rm a ti n i y la n o s h i d e n i si e o f vi e o i g e n e ra l y i t d n d d t l sn n o ti a b l a t a l , h o w e ve r th e m o re i fo rm a ti n ce e l n o th a t i h i d e n th e m o re n o ti a b l i w i l s d ce e t l b e co m e .

Tools :- msu StegoVideo

How it works :In this our original data is embed with the

carrier file to form STEGDATA.

Example:

D e te cti g S te g a n o g ra p h y n : The art of detecting Steganography is referred to as

Steganalysis.

Using different tools like sendsecret, Steganography 8.1 , Stegdetect, Hiderman etc. Steganalysis does not deal with trying to decrypt the hidden information inside of a file, just discovering it. It is mainly done with comparing the encrypted file with the original copy. It can be done through Histogram technique.

Information hidden behind the image.

Detecting By histogram technique :

Applications in Modern Printers Used in HP and Xerox brand color Laser

Printers. Tiny Yellow dots are added to each page. The dots are barely visible and contain Encoded printer serial numbers, as well as date and time stamps.

Machine ID codes in laser printers

See http://www.eff.org/Privacy/printers/

Machine ID codes in laser printers

Machine ID codes in laser printers

Machine ID codes in laser printers

A d va n ta g e s : It is used in the way of hiding not the

Information but the password to reach that Information. Difficult to detect .Only receiver can

detect. Can be applied differently in digital

image, audio & video file. It can be done faster with the large no

of software's.

D i d va n ta g e s : sa Huge number of data = huge file size, so

some one can suspect about it. In sending and receiving information can

be leaked. The confidentiality of information is

maintained by the algorithms, and if the algorithms are known then its all over. If this technique is gone in the wrong

hands like hackers, terrorist ,criminals then this can be very much dangerous for all.

C o n cl si n : u o Though steganography is not implemented in wider ways but it can be the best security tool. The main problem of today's world is to secure their data confidentially, the techniques used currently are not considered the best which can only be replaced by Steganography. If it gets in the hand of terrorist then it could be even worse than WTC Attack in which steganography was used.

Bibliographywww.wikipedia.org http://zone-h.org h ttp :// w w w . e ffo rg / Pri cy / p ri te rs/ . va n N . p ro vo s & P. H o n e ym a n , H i e & S e e k : A n d

I tro d u cti n to S te g a n o g ra p h y , I E E n o E S e cu ri a n d p ri cy ty va D . A rtz, D i i lS te g a n o g ra p h y: H i i g D a ta g ta d n w i i D a ta , I E E S e cu ri a n d Pri cy th n E ty va

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