Comparative Analysis of Image Steganography using SLT, DCT and SLT-DCT Algorithm

Imam Riadi,Lilik Widyawati,Yudi Prayudi

doi:10.30812/matrik.v20i1.701

Abstract

Steganography is an interesting science to be studied and researched at this time, because steganography is the science of hiding messages on other digital media so that other parties are not aware of the existence of information in the digital media. Steganography is very effective in maintaining information security, because the existence of this information is obscured so that it is difficult to know where it is. This paper discusses hiding text into images using the Slantlet Transform (SLT) method, Descreate Cosine Transform (DCT) and Hybrid of SLT and DCT. The three methods are implemented in the frequency domain where steganographic imagery is transformed from the spatial domain to the frequency domain and the message bit is inserted into the cover image frequency component. The comparison parameters of these three techniques are based on MSE, PSNR, Capacity & Robustness. From the results of the tests that have been done, it is obtained that the highest PSNR value is generated using the SLT-DCT method, the largest storage capacity is the SLT method while the resistance, SLT-DCT method and DCT method are more resistant to attack than the SLT method.

Highlights

Information security at this time is very important because it is easy to access data exchange to make the data and information must be protected so that its existence is not known by parties who are not interested
The method we propose increases the PSNR and the less capacity in the Descreate Cosine Transform (DCT) Method [8]
“Implementasi Steganografi Menggunakan Teknik Adaptive Minimum Error Least Significant Bit Replacement ( AMELSBR ),” in Seminar Nasional Aplikasi Teknologi Informasi 2005, 2005, pp. 1–6

Summary

Introduction

Information security at this time is very important because it is easy to access data exchange to make the data and information must be protected so that its existence is not known by parties who are not interested. Techniques for maintaining the security of digital information can be done in several ways, one of which is by hiding the information into other digital media, this technique is called steganography. One type of files that are widely used and generally contain important information is digital image. There are two general stages in digital steganography, namely the process of embedding or encoding and the process of extracting or decoding (expressing). The image of the steganographic technique is divided into two, namely the spatial domain and transformation domain [3], Spatial domain techniques insert secret bits directly in the cover file, the spatial domain technique commonly used is Least Significant Bit Insertion (LSB). The domain transform hides secret bits in important parts of the Journal homepage: https://journal.universitasbumigora.ac.id/index.php/matrik

Methods

Results

Conclusion