Steganography

Steganography is the art and science of hiding messages. Steganography is often combined with cryptography so that even if the message is discovered it cannot be read. 
The word steganography is derived from the Greek words “steganos” and “graphein”, which mean “covered” and “writing.” Steganography, therefore, is covered writing.
Historical stenganography involved techniques such as disappearing ink or microdots. Modern steganography involves hiding data in computer files.
It is fairly easy to hide a secret message in a graphic file without obviously altering the visible appearance of that file.

Stegnography Process:

Image source: Nascom

Steganography software

OutGuess: OutGuess is a universal steganographic tool that allows the insertion of hidden information into the redundant bits of data sources. The nature of the data source is irrelevant to the core of OutGuess. The program relies on data specific handlers that will extract redundant bits and write them back after modification. In this version the PNM and JPEG image formats are supported. In the next paragraphs, images will be used as concrete example of data objects, though OutGuess can use any kind of data, as long as a handler is provided.
F5: F5 is a publicly available steganography software package which hides messages in BMP, GIF , and JPG graphics.
Camera/Shy: Camera/Shy is the only steganographic tool that automatically scans for and delivers decrypted content straight from the Web. It is a stand-alone, Internet Explorer-based browser that leaves no trace on the user’s system and has enhanced security.
SteganographX Plus: SteganographX Plus is another small tool that lets you hide your confidential data inside a BMP image. It also does not need any installation and is of only 496 KB in size. This is simple and offers an easy-to use-interface. You can use this tool to hide your sensitive data inside a BMP file and recover your data from that file.
OpenStego: On the off chance that you are looking for a steganography apparatus, OpenStego is another acceptable choice. You can connect any sort of mystery message record in a picture document. You can conceal pictures in BMP, GIF, JPEG, JPG, PNG and WBMP.  You can conceal information in these documents and accept yield as a PNG record. A similar programming will be utilized to uncover information from the yield record. It additionally utilizes a secret key to scramble your information alongside stowing away inside the picture record. This apparatus is open-source and created in Java.
Hideโ€™Nโ€™Send: Hide’N’Send is a little utility which offers steganography. It allows you to shroud any sort of document behind a JPG picture record. It upholds hashing and encryption as well. This implies that you can conceal your information by encoding. This adds an additional layer of security. The interface of the instrument is basic and offers two tabs โ€” one to conceal information and other to remove information. You can choose the alternatives likewise. Just run the instrument, select the picture document, at that point select the record which you need to stow away, select the encryption type and afterward conceal the information in the picture. Utilize a similar device again to remove the concealed data in the picture.

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