A secure text communication scheme based on combination of compression, cryptography, and steganography

Abstract

Nowadays security plays a crucial role in distinct fields of science and technology. Vast quantity of information security and information hiding algorithms are available for textual data shield. This research mainly focuses on amalgamation of the advantages of compression, encryption, and steganography schemes in order to enhance the notion of security. The offered systems provide lossy techniques for compression and encryption, i.e., jpeg, mpeg, and block cipher methods. These techniques are secure but have high computational costs. In this paper, a Secure Text Communication Scheme is proposed with a combination of compression using Text Converter Technique (TCT), encryption using bits to Latin1 Unicode function, and steganography done using NT–DCT. These newly defined algorithms have advantages of high encryption speed, reduced processing time, and provide more reliable private data. The main goal is to hide a huge amount of text behind a single image without causing any distortion in its original image quality.