الرسائل المخفیة فی صورة JPEG باستخدام إخفاء المعلومات

AbstractSteganography is the process of hiding one medium of communication (text, sound or image) within another. In the last few years, we have seen many new and powerful steganography and steganalysis techniques reported in the literature. The modern Methods of Steganography use the properties of the media itself to convey a message. Digitally embedding messages in other media, such as: Plain Text, Hypertext, Audio / Video, Still Imagery, Network Traffic.In the following tutorial we go over some general concepts and ideas that apply to image steganography and steganalysis. We review and discuss the notions of steganographic security and capacity. The goal of this paper is to determine the steganographic capacity of JPEG images by using DCT coefficients properties and static analysis for them. We illustrate also some techniques for image Steganography.