Information Hiding: A Generic Approach

Abstract

Problem statement: Privacy and security over communication channels are of primary concerns. Due to their complexity and diversity, there is a need for continuous improvements of the adopted solutions. In this study, we consider two of the adopted ones, namely, steganogrphy and cryptography and propose a new information hiding system. Approach: The proposed system was based on a generic approach that incorporates text-based steganography and cryptography methods in a way that permits their combined or stand alone adoption. Thus, achieving message encryption incorporated with its concealing inside another unsuspicious one. Furthermore, two steganography methods (the inter-word spaces method and syntactic methods) had been combined with a hybrid textencoding in a form of binary representation of terns rewriting systems. Results: An information hiding system had been implemented. The system offered encrypting and hiding dynamic and static text within a cover-text. The conducted experiments using static texts had shown a non-noticeable increase (0.02%) in the size of their respective stego-texts. For the dynamic texts, cover-texts with a size proportional to the length of the secret messages were needed. Conclusion: A generic model for information hiding with a respective implementation framework had been used as an effective tool to develop a hybrid and scalable steganography system that combined good features from the existing ones.

Bilingual Information Hiding System: A Formalized Approach

“…For example, the average size according to our system is 25% and the one according to the system proposed in [5] is 2%. However, the proposed system has better results in terms of the following:…”

“…For the purpose of our research, we consider steganography as a method of hiding the existence of a bilingual secret message in Arabic text [4]. Textsteganography proceeds according to the following scheme [5]:  A secret message is concealed in a cover-text using an embedding algorithm to produce a stego-text.…”

“…Based on the presented scheme, the secret message is concealed using one of the following methods [5,6]:…”

Modified Linguistic Steganography Approach by Using Syntax Bank and Digital Signature

“… Upon its delivery, the secret message is recovered using an extracting algorithm.  The embedding and the extracting algorithms are augmented by the so called a stego-key to encrypt and decrypt the hidden data respectively [3]. Text steganography is broadly classified into the two categories; Linguistic steganography which is further divided into semantic and syntactic method and format based steganography which is further divided into line-shift, word-shift, open-space and feature encoding [4] as described in the fig.…”

Text Hiding in Mobile Phone Simple Message Service Using Fonts

“…The related studies in hiding text are line shifting , Word Shifting (Kim et al, 2003), semantic methods feature coding (Rabah, 2004), Abbreviation (Bender et al, 1996), Open Spaces (Huang and Yan, 2000), Persian/Arabic Text steganography and hiding dynamic and static text within a cover-text (Riad et al, 2009). The methods which study on hiding data in SMS are Stealth Steganography in SMS, which steganography in the pictures of SMS messages (Shirali-Shahreza, 2006) and Text Steganography in SMS which use and develop abbreviation text steganography with the use of the invented language of SMS-Texting (Shirali-Shahreza and Shirali-Shahreza, 2007).…”