The Tech Daily

Yes, you can hide a secret information in any file you want, a JPEG file for example. The art of writing hidden messages in such a way that no-one, apart from the sender and intended recipient, suspects the existence of the message is called Steganography.



Steganography is used by some modern printers, including HP and Xerox brand color laser printers. Tiny yellow dots are added to each page. The dots are barely visible and contain encoded printer serial numbers, as well as date and time stamps.

Steganography can be used for digital watermarking, where a message is hidden in an image so that its source can be tracked or verified.

It is also used by terrorists to send encrypted messages without arousing any suspicion. There are many tools to do that. One of them is S-Tools.



S-Tools is a steganography tool that hides files in BMP, GIF, and WAV files. You open up a copy of S-Tools and drag pictures and sounds across to it. To hide files you just drag them over open sound/picture windows. You can hide multiple files in one sound/picture and your data is compressed before being encrypted then hidden.

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