An art of hiding secret message into another innocent looking message is called steganography and it is an old discipline, where techniques like invisible ink, micro dots have been used. With rise of digital technologies new possibilities for stenography appeared and attracted interest of computer scientists and fans. Common approach is to hide secret information into multimedia files – pictures, music, videos …. Main advantages here are omnipresence of media today, significant size of media file, so there is enough space for additional information and the nature of the media format, which often enables to hide information in very clever way( if you change last bit of color information for a pixel in an image it is unidentifiable by human eye). But we can also hide secret messages in regular text, especially if we are using Unicode text encoding (which is now very common).