It is easy to use encryption to hide messages inside of other objects. Steganogr

Question

It is easy to use encryption to hide messages inside of other objects. Steganography is the art of hidden writing. You can get Hide in Picture (HIP) at http://www.quickcrypto.com/free-steganography-software.html - Download the QuickStego. You can then encrypt a message or even a program that can be extracted by using an encryption key. Download HIP, hide a text message in a picture, and send the picture and key to someone to see whether they can extract the secret message. How could you detect hidden messages in web page images?(explain with 7 to 10 lines).

Explanation / Answer

Observing at repetitive patterns, you can detect hidden information in stego images which reveal the identification or signature of a steganography tool or hidden information. Also small distortions can reveal the existence of hidden information. These patterns can be analysed by comparing the original cover images with the stego images. By comparing numerous images, patterns become possible signatures to a steganography tool. A few of these signatures might identify the existence of hidden information and the tools used to embed the messages. With this information, if the cover images are not available for comparison, the derived known signatures are enough to imply the existence of a message and identify the tool used to embed the message.

There are various tools used for detecting hidden information stored in the form of web images:

1) Guidance Software, Inc.

2) ILook Investigator.

3) Comparing the MD5 hash values of two files wiwith the program, md5sum.exe. This program is found easily on Internet.

4) Detecting hidden information with Stegdetect and Xsteg (freeware).

5) Detecting hidden information with file compression.

6) Detecting hidden information with Stego Watch from WetStone Technologies Inc.

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