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Image steganography using exploiting modification direction for compressed encrypted data
استگانوگرافی تصویر با استفاده از جهت اصلاح برای داده های رمزگذاری شده فشرده شده-2019 Building a balanced relation between image quality and the payload, the robustness of the method in facing
electronic attacks and securing data, all the mentioned processes represent the main challenge in
steganography. Here, a novel approach to steganography is suggested using Vigenere Cipher and
Huffman Coding methods to encrypt and compress the mystery message content. This approach will raise
the security and ensure the message content cannot be extracted without earlier knowledge of decrypting
rules and the Huffman Dictionary Table. Later, the image is segmented into blocks, size (w*h) groups
for each block and with each group having n pixels. Subsequently, the knight tour algorithm and arbitrary
function are utilized to select which blocks and groups can be used to conceal the mystery digit within a
specific pixel in the group randomly. This is to address the weakness of the Exploiting Modification
Direction (EMD) technique that uses a serial selection to enhance the robustness of the suggested
scheme. The EMD technique is then utilized to insert the mystery digits inside a specific pixel. Later,
the chi-square method is employed to apply statistical attacks on the stego-image to estimate the suggested
scheme robustness. The empirical outcomes show that the suggested scheme is more efficient
compared to the old Steganography schemes with respect to Imperceptibility by PSNR of 55.71 dB, the
Payload of 52,400 bytes and the robustness. Keywords: Steganography | Cryptography | Exploiting modification direction | Knight tour | Vigenere cipher | Huffman coding |
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