Work with symmetric and asymmetric encryption using gpg and steghide.

Take screen shots and document all of your progress. Present your results in a single report document. See the provided sample report for an example.

Provide clear screenshots of your own work. Provide an explanation for your screenshots and results. Do not provide any image or text from another source without citation.

Begin here:

Create a plaintext file with the following text:

Your name

NetID

This is my secret message.

Encrypt the plaintext file with symmetric encryption (Use password: letmein):

gpg --symmetric plaintext.txt

Import the provided public key:

gpg --import csmith_pub.key

List keys:

gpg --list-keys

Create a key pair. Save your password!:

gpg --gen-key

List keys:

gpg --list-keys

Export your public key as Ascii:

gpg --export -a > public.key

Sign the plaintext.txt:

gpg -a --output plaintxt.txt.asc.sig --sign plaintxt.txt

Encrypt the signed file to Ascii output using provided key:

gpg -e -a -u "Christopher Smith" -r "Christopher Smith" plaintxt.txt.asc.sig

Install steghide:

sudo apt-get steghide

Check manual for usage examples and program description:

man steghide

Select a JPG file to use. Name it image.jpg

Get the md5 digest for the image.jpg file BEFORE embedding:

md5sum image.jpg

Include this digest value in your results report.

Embed your plaintext file into the screenshot file:

steghide embed -cf image.jpg -ef plaintext.txt

Get the NEW md5 digest for the image.jpg file AFTER embedding:

md5sum image.jpg

Include this digest value in your results report.

Check that you can extract the embeded file:

steghide extract -sf image.jpg

Conclusion

In the conclusion of your results report, discuss limitations and use cases for the tools used in the activity. Be specific. (10% of score)

Deliverables

Submit the following files:

Report of your process, summary, and results including screenshots

plaintext.txt

symmetric encrypted plaintext with password letmein

your public key in Ascii format

asymmetric signed and encrypted plaintext file

image.jpg with embeded plaintext using steghide with password letmein