Neil F. Johnson. Steganography. Technical Report. November 1995.

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Decoding the message is not as involved but still requires a third party program to view the image. To decode a message, one must:

  1. Run GETSCR. This starts a TSR which will perform a screen capture when PRINTSCREEN is pressed.

  2. View the image containing a message with a third-party image viewing software (not included with StegoDos) and press PRINTSCREEN to save the image in MESSAGE.SCR.

  3. Run DECODE. This will extract the stored message from MESSAGE.SCR.

Due to the size restrictions, M2 and C1 could not be used. C2 (Shakespeare) and a number of other containers were tested (both color and gray-scale) with M1. Every one of them were obviously distorted. There was little distortion within the C2 image, but it was cropped and fitted into a 320 x 200 pixel image. The image on the left is the original C2 file. The image on the right contains the M1 message:

 [Fig 8: Result of embedding Message1 into Container2 (43k)]

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