Stealth steganography in SMS

The short message service, abbreviated to SMS, is one of the services used in mobile phones and has been warmly welcomed by the public throughout the world, esp. in Asia and Europe. Using this service, individuals can write and send to each other short messages and also black and white pictures. On the one hand, considering the issue of information security and esp. establishing hidden communications, many methods have been presented for hidden communications, among which steganography is a relatively new one. Combining steganography of data in picture and using pictures in SMS messages, this article proposes a method for hidden exchange of information. The main focus of this article is on steganography in B&W (black and white) pictures and making this possible on mobile phones considering the limitations in mobile phones. After receiving a picture message containing hidden data, the decoder program extracts the data and immediately changes the steganography places. Therefore, the picture saved on the recipient's mobile phone will not contain any hidden information. This paper has been implemented with J2ME (Java 2 Micro Edition) and has been implemented on a Nokia 6680 mobile phone.