A New Text Steganography Method By Using Non-Printing Unicode Characters

Abstract

One of the methods used in security areas is steganography. Steganography is the artand science of hiding information by embedding messages within cover media withoutattracting attention. the cover media can be text, image, video or audio files. Textsteganography is more difficult than others due to the difficulty in finding redundantinformation in text file. This paper presents a new idea for text steganography by usingUnicode standard characters, (which have the non-printing properties) to encode theletters of English language and embedding the secret message letter by letter into thecover-text.This method has high hiding capacity, it can hide (K+1) letters in a text with Kcharacters and it does not make any apparent changes in the original text. So it satisfiesperceptual transparency.