Steganography is the art and science of hiding messages. The word steganography is derived from the Greek words “steganos” and “graphein”, which mean “covered” and “writing.” Steganography, therefore, is covered writing.It includes a vast array of secret communications methods that conceal the message’s very existence. It refers to the science of invisible communication.
Steganographic techniques strive to hide the very presence of the message itself from an observer. Steganography in the modern day sense of the word usually refers to information or a file that has been concealed inside a digital Picture, Video or Audio file.
1. Mozaiq:- Mozaiq is a online tool fro to hide a message into pictures. Here you can hide a secret, encrypted message inside an image that will be invisible to the naked eye and undetectable to everything. The best thing is here that your message will be stored encrypted using a password of your choice, making your message all but impossible to read!
2. F5:- is a publicly available steganography software package which hides messages in BMP, GIF, and JPG graphics.
3.JPHIDE and JPSEEK:-JPHIDE and JPSEEK are programs which allow you to hide a file in a jpeg visual image. There are lots of versions of similar programs available on the internet but JPHIDE and JPSEEK are rather special. The design objective was not simply to hide a file but rather to do this in such a way that it is impossible to prove that the host file contains a hidden file.
4. StegHide:- Steghide is a steganography program that is able to hide data in various kinds of image- and audio-files. The color- respectivly sample-frequencies are not changed thus making the embedding resistant against first-order statistical tests.
5. Hydan:- Hydan steganographically conceals a message into an application. It exploits redundancy in the i386 instruction set by defining sets of functionally equivalent instructions. It then encodes information in machine code by using the appropriate instructions from each set.