With the spread of digital data around the world through the internet, the security of the data has raised a concern to the people. Many methods are coming up to protect the data from going into the hands of the unauthorized person. Steganography and cryptography are two different techniques for data security . The main purpose in cryptography is to make message concept unintelligible, while steganography aims to hide secret message. Digital images are excellent carriers of hidden information. In this paper a new steganography approach proposed based on LSB technique by using Alpha channel on JPG cover images and Bit-slicing decomposition and AES ( Advanced Encryption Standard) on the secrete image. for this method first the secrete image decomposed to bit streams and the data encrypted using AES algorithm. On the cover side, an alpha channel is attached to the cover image and the data embedded into LSBs of RGBA channels. The method was implemented and tested by using MATLAB® (R2011a).

Tarik Z. Ismaeel

Papers

New High Capacity Secure Steganography Technique