In this project, you use S-Tools4 to create secret message in a bitmap file and
compare this steganography file with the original file by using the DOS
comp command. You need S-Tools4 and the Mission.bmp a
...
In this project, you use S-Tools4 to create secret message in a bitmap file and
compare this steganography file with the original file by using the DOS
comp command. You need S-Tools4 and the Mission.bmp and USDECINP.rtf
files in your work folder. Follow these steps to create steganography file:
1. If you have exited S-Tools4, start it by double-clicking
S-Tools.exe
in
File Explorer.
2. Drag
Mission.bmp
from your work folder to the S-Tools window.
3. Next, drag
USDECINP.rtf
from your work folder to the
Mission.bmp
image.
. Type
hop08-5
in the Passphrase and Verify passphrase text boxes, and then
click
OK
. A hidden data window opens in the S-Tools window.
5. Right-click the hidden data window and click
Save As
. Save the image as
Mission-steg.bmp
in your work folder. Exit S-Tools.
Next, you use the DOS
comp
command to compare these two files and redirect
the output to a text file for further analysis:
1. To open a command prompt window in Windows 8 or later, click the
Search
icon, type
cmd
, and then press
Enter
. In Windows 7 or earlier, click
Start
, type
cmd
in the "Search for programs and files" text box, and then
press
Enter
.
2. Change to your work folder by typing
cd
n
Work
n
Chap08
n
Projects
(substituting the path to your work folder) and pressing
Enter
.
3. Type
comp Mission.bmp Mission-steg.bmp > Mission-compare.txt
and press
Enter
, and then at the Compare more files (Y/N) ? prompt,
type
n
and press
Enter
.
4. In File Explorer, navigate to your work folder, and open the
Mission-compare.txt
file to see what discrepancies were found.
When you're finished, close the file, and exit the command prompt
window by typing
exit
and pressing
Enter
.
5. To complete project, write one-page report on the number of
mismatches and the deviation in each mismatch between the two files.
In addition, state your observations of the differences in the two files,
such as hexadecimal values and their patterns.
Engineering & Technology
Computer Science
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