CONFIDENTIAL INFORMATION SECRET METHOD
The article deals with the issues of hiding text information in a graphic file. Most often, one or two least significant bits of the image pixels are modified. To do this, each byte of the secret message is divided into 8 or 4 parts. The use of the least significant bits of the graphic file for t...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Astana IT University
2020
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/fcd5596ed45840fc8b1c989a058be6c9 |
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| Sumario: | The article deals with the issues of hiding text information in a graphic file. Most
often, one or two least significant bits of the image pixels are modified. To do this, each byte
of the secret message is divided into 8 or 4 parts. The use of the least significant bits of
the graphic file for transmitting a secret message significantly limits the size of the original
message, in addition, it allows steganographic analysis programs to detect and decrypt the
transmitted data. A formula for hiding textual information in image pixels is proposed. The
algorithm for hiding information is that the bytes of the secret message are mixed with the
bytes of pixels of the key image using a secret formula. The result is new bytes of image pixels.
A steganography scheme has been developed for embedding secret text in random image
pixels. Random bytes are pre-embedded in each pixel row of the original image. As a result of
the operations, a key image is obtained. Text codes are embedded in random pixel bytes of a
given RGB channel. To generate a secret message, the characters of the table of ASCII codes
are used. The detection and decryption program compares the pixels of the received image
with the pixels of the key image in the specified RGB channel and extracts the codes of the
encrypted text. The use of abstract images as a key image significantly increases the reliability
of the protection of confidential information, since in such images there is a random change
in pixel values. Demonstration programs for encryption and decryption in the Python 3.5.2
programming language have been developed. A graphic file is used as the decryption key. The
developed steganography scheme allows not only transmitting sensitive information, but also
adding digital fingerprints or hidden tags to the image |
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