Steganography: How to Hide Secret Information inside JPG Image Files?

Last year, there were several publications in press that al-Qaeda operatives were sending out encrypted messages to the terrorist groups members by hiding them inside digital photographs on eBay. While there no definite proof that this claim is justified, it is quite easy to hide any other file or group of files inside a JPEG image. You can place video clips, pdf, mp3, Office documents, zipped files, webpage or any other file format without special software and encoding knowledge. Any stranger that will get the image and will open it in either a photo editing software or as a thumbnail inside