استیگانوگرافی دیجیتال

استیگانوگرافی دیجیتال

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استیگانوگرافی دیجیتال

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استیگانوگرافی دیجیتال

Digital Steganography :Hiding Data within Data

To human eyes, data usually contains known forms, like images, e-mail, sounds, and text. Most Internet data naturally includes gratuitous headers, too. These are media exploited using new controversial logical encodings: steganography and marking.

استیگانوگرافی دیجیتال

 Take a moment and think about my first paragraph. If your only thoughts are that I wrote a vague and awkward introduction, then I have succeeded in using a very simple form of steganography. Observe the first letter of every word in the
first paragraph and then add some appropriate spaces in the resulting string of characters. You
should discover a hidden message: “The duck flies at midnight. Tame uncle sam.” If you suspected
that my first paragraph contained a hidden message before I told you it was there, then my
attempt at steganography failed. My chances of success are fairly high, however, given that most
individuals never consider the fact that there is more than one way to parse something that looks
like written English in a magazine.

استیگانوگرافی دیجیتال

 Internet users frequently need to store, send, or receive private information. The most common way to do this is to transform the data into a different form. The resulting data can be understood only by those who know how to return it to its original form. This method of protecting information is known as encryption. A major drawback to encryption is that the existence of data is not hidden.
Data that has been encrypted, although unreadable, still exists as data. If given enough time, someone could eventually unencrypt the data. A solution to this problem is steganography.

استیگانوگرافی دیجیتال

The Data beneath the Wax

Digital steganography is the art of inconspicuously hiding data within data. Steganography’s goal in
general is to hide data well enough that unintended recipients do not suspect the steganographic
medium of containing hidden data. In my opening example, I used this article as the carrier data. I
inserted my hidden data using a technique I hoped the reader would never suspect. But now that I have revealed this article as a medium of steganography, my success in using a similar technique will be limited. This is true simply because you might now suspect that something other than an article on steganography (maybe another hidden message) exists within the remainder of my writing.

استیگانوگرافی دیجیتال

استیگانوگرافی دیجیتال

استیگانوگرافی دیجیتال