Steganography in Multimedia Messaging Service of Mobile Phones
Mobile phones are the most commonly used devices in today’s scenario. The expanding use of mobile phones, telecommunication companies added feature such as MMS (Multimedia Messaging Service) in order to attract more customers. The Multimedia Messaging Service (MMS) has became very popular for sending messages containing multimedia objects such as images, audio, or video clips among mobile users. Alongside, the need for the secure communication became more imperative. Steganography is the most reliable technique for hidden communication. Hiding information, especially in images has been an alternative solution for secret communication. In this paper three steganographic approaches within a MMS are presented and discussed. There applications in mobile environment are analyzed. The platform used here is MATLAB. Keywords: Steganography, Multimedia Messaging Service (MMS), PN generator. 1. INTRODUCTION The main motive of using Mobile phones has been the exchange of information between two users. The Short Messaging System was introduced with GSM mobile phones and it is very rapidly become popular among users . The Multimedia Messaging System (MMS) offers the ability to send and receive multimedia content using a mobile phone. The most important factor of MMS has been the security of the information. Steganography concerns itself with ways of embedding a secret message into a cover object, without altering the properties of the cover object evidently. The embedding procedure is typically related with a key, usually called a stego-key. The basic steganographic model is shown in Fig. 1. Steganography is mainly applied to the media such as text, images, video clips, music and sounds.