basic tips.pptx

8/13/2019 Basic tips.pptx

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Basic tips and tricks


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Steganographycomesfrom the Greek and

literally means, "Covered

or secret writing".Although related to


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Steganography is Data Hiding

Steps in Steganography:

The data to be transmitted is hidden in a Cover Image.

The resulting image called the StegoImage is transmitted.

The receiver then applies the inverse process to retrieve the data.

What is Steganography???
http://upload.wikimedia.org/wikipedia/commons/b/b8/En-us-steganography.ogg


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Steganography( ) is the art and science of writing

hidden messages.
http://upload.wikimedia.org/wikipedia/commons/b/b8/En-us-steganography.ogghttp://upload.wikimedia.org/wikipedia/commons/b/b8/En-us-steganography.ogghttp://upload.wikimedia.org/wikipedia/commons/b/b8/En-us-steganography.ogg


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~ Motivation

Protection of Digital Media.

Privacy of Information transmitted across theword wide web.

~ Goal

To make the transmitted information invisible byembedding the information in a cover media.

We try to enhance the security and the robustness

of the information against attacks and Imageprocessing techniques.


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HISTORY

Earlier invisible ink was used to write information on pieces of paper

Head of messengers were shaved so, a message could be written on it

Wax tablet was peeled on whichmessage was to be written & refilled

Null cipher sent by the German embassy in World War I

PRESIDENT'S EMBARGO RULING SHOULD HAVE IMMEDIATENOTICE. GRAVE SITUATION AFFECTING INTERNATIONAL LAW.STATEMENT FORESHADOWS RUIN OF MANY NEUTRALS. YELLOW

JOURNALS UNIFYING NATIONAL EXCITEMENT IMMENSELY.

(Taking the first letter in each word of message reveals the hidden text.)

PERSHING SAILS FROM NY JUNE 1


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History of Steganography:Through out history Steganography has been used to secretly communicate

information between people.Some examples of use of Steganography in past times are:

During World War 2 invisible ink was used to write information on piecesof paper so that the paper appeared to the average person as just being blankpieces of paper. Liquids such as urine, milk, vinegar and fruit juices were used,because when each one of these substances are heated they darken and become

visible to the human eye. In Ancient Greece they used to select messengers and shave their head, theywould then write a message on their head. Once the message had been writtenthe hair was allowed to grow back. After the hair grew back the messenger wassent to deliver the message, the recipient would shave have off the messengers

hair to see the secret message. Another method used in Greece was where someone would peel wax off atablet that was covered in wax, write a message underneath the wax then re-apply the wax. The recipient of the message would simply remove the wax fromthe tablet to view the message.


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1

Hiding the fact that

information is beingsent.

Usually hiding thedata inside otherdata.

What is

Steganography

.

2

Converting the data

into non readable(non perceivable)data

Its a way to passdata so that itbecome safe.

Any unauthorized

person is not ableto understand it

What is

Encryption

The data is passed inan unusual

communicationmanner.


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Steganographic Techniques

Genome Steganography

Hiding in Text

Hiding in the disk space

Hiding data in software and circuitry

Information Hiding in Images

Hiding in network packets

Hiding in music files & video


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Sample Result


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Steganography Recon

Niels Provos and Peter Honeyman @ University of Michigan

Tools used: StegDetect, StegBreak, Crawl, Disconcert

2 million images on Ebay site scanned.

Only 1 stego-image found

sovereigntime.jpg "B-52 graveyard" at Davis-Monthan Air Force Base


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Rename folder from the right clickoption........

Now press alt and press 255...

press 255 frm the right side of thekey bords i.e, Num pad.

where only numbers are given.....


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This is something pretty cool and neat...and

unbelievable... At Microsoft the whole Team,

including Bill Gates, couldn't answer why this

happened!

It was discovered by a Brazilian. Try it out

yourself...Open Microsoft Word and type

=rand (200, 99)

and hit enter.


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1)Right Click on the desktop.

Make a new folder

2)Now rename the folder with a blank space by holding ALT

key and type 0160.

3)Now you have a folder without a name.

4)Right click on the folder>properties>customize.

Click on change icon.

5)Scroll a bit, you should find some empty spaces, click on any

one of them.

Click ok


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Create a new text file on your desktop

Type

FreeMem=Space(64000000)in this file and save it as RAMcleaner.vbs


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The onclusion

The conclusion is that in this world there arestill

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