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A Novel Steganography Approach for Securing Confidential Personal Data
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Journal Article
A Novel Steganography Approach for Securing Confidential Personal Data
2025
Overview
In light of significant advancements in information technology and the increasing sophistication of methods used to access confidential information, particularly in critical sectors such as healthcare, intelligence, ATM cards, mobile applications, and the military, the use of steganography has become paramount. Steganography enables the concealment of sensitive data within various forms of multimedia, including videos, images, and sound. This not only secures the information to maintain confidentiality by preventing disclosure the sensitive data by unauthorized, but also conceals the very existence of communication between two entities. Our proposed approach introduces an innovative, lightweight technique that uses the Discrete Cosine Transformation (DCT) coefficients for data hiding according to specific thresholds and the distance between coefficients. Unlike traditional Least Significant Bit (LSB) steganography that operates in the spatial domain, our approach utilizes the frequency domain to enhance the concealment and security of the data. The effectiveness of our method was validated through standard metrics such as CC, MSE, PSNR, SSIM, and Histogram analysis. Three benchmark images (Lena, Baboon, Pepper) with 512x512 dimensions were used in the evaluation. demonstrating promising results. Furthermore, it exhibited robustness against compression by utilizing DCT coefficients from the medium frequency (MF) range. Payload enhancement was achieved by embedding the secret data into an RGB image (49,152 bits) which can be increased if we used a larger size of 512x512 image dimension. Using a 4x4 block size instead of 8x8 is suitable for IoT environments or mobile devices with limited resources while preserving the imperceptibility of modifications needed for each block. We tuned important hyperparameters, including the selection of DCT coefficients and threshold values.by utilizing two pairs of DCT coefficients instead of just one enhancing the security.
Publisher
جامعة جرش
Subject
