Myanmar Character Hiding into BMP Image Based on Hexadecimal-Digits Representation

Abstract

Steganography is the approach for hiding any secret message in a variety of multimedia carriers like text, images, audio or video files. Whenever hiding a secret message, it is very important to make it invisible. This paper proposes a technique to hide Myanmar text message into BMP image by representing Myanmar Unicode hexadecimal value of each character in the secret message. It also represents each hexadecimal pixel value in the cover image as a set of separated single hexadecimal-digit. The technique creates a matching list from the hexadecimal-digits of the characters in the secret message with the hexadecimal-digits of the pixels in the cover image. The technique compresses the created matching list to be as small as possible to embed it in the unused file space at the end of the cover image file. The results show that this technique provides security against visual attack because it does not make any changes in the pixel of the cover image.