Steganography is a long know strategy to hide messages. Characteristic is that nobody even notices their existence. In digital photos you can easily hide text in the color information. This program uses one pixel per byte text. That means for example that a three Megapixel photo with 24-bit encoding (e.g. 2048 * 1536) can contain 3 Megabytes of text- or a thumbnail of 32 * 32 Pixels 1 KB. And you hardly notice it. But the smaller the ratio text/pixels the better. Pictures with only 8-bit color information can be handled as well. Their Capacity is a third of the above.
The position of each used pixel looks randomized - if you Detect one. It is calculated in a unique and very fast way and depends on your password. The password is not stored in the picture! Try a slightly different password to recover the text and you will see what a garbage you get. The pictures with the hidden text cannot be compressed. Compression means loss off accuracy. The letters cannot be recognized anymore. You must save them in bmp-format. But you can open and use pictures in jpg-format. Internally they are transformed to bmp-format. Most programs that can handle pictures can use the bmp-format - including the latest internet browsers.
The program has two main windows. The Simple Text editor for plain text and the picture window.
Main functions:
Hide text - the given text is written to the picture.
Check - checks if hidden text can be detected with your password
Recover text - reads the hidden text if the password is correct.
The time that your PC needed for the last process of hiding or recovering text is displayed in the statusbar in milliseconds.
The picture window has these functions:
Open picture, Reload and Save picture
On/off - shows or hides the overview window
Test: built in testpictures
The trial version has all functions enabled. Only saving of pictures is disabled after some time.
