Question

Hands-On Project 9-1

In this project, you perform bit-shifting on a file and verify that the file can be restored.

1. Start Notepad and type the following in a new text document: This document contains very sensitive information. We do not want the competition to be able to read it if they intercept the message.

2. Save the file as correspondence.txt in your work folder, and then exit Notepad.

3. Start WinHex, and open the correspondence.txt file.

4. Click Edit, Modify Data from the menu. In the Modify Block Data dialog box, click the Circular left rotation option button, and then click OK.

5. Save the file as correspondence1.txt, and exit WinHex.

6. Restart WinHex, and open correspondence1.txt. Click Edit, Select

   All from the menu.

7. With the file’s contents highlighted, click Edit, Modify Data from the menu. In the Modify Block Data dialog box, click the Circular left rotation option button, if necessary, to rotate the bits, and then click OK. Repeat this step seven times to verify that you can recover the data.

8. When you have recovered the text to its readable state, save it as correspondence2.txt.

10. Write a short paper stating whether you think this method is a reliable one for encrypting. Leave WinHex running for the next project.

Answer 1

Step 7
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data recovered to original state

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