摘要: Steganography is used mostly when the fact of communicating needs to be kept covert. This carried out by embedding secret data in apparently innocuous covers. Typical covers are image, video, and audio files (Munuera, 2007). For steganographic systems, major requirement that stego object should perceptually statistically indistinguishable degree it does not raise suspicion. In other words, hidden information impose slight or undetectable modification cover objects (Wu & Shih, 2006).