Part 1:
This assignment demonstrates several types of ciphers that you learned about this week. You will also try your hand at the XOR (exclusive OR) operation.
Download the document. Read the instruction and test your skills on the examples. You will try a Caesar cipher, Permutation cipher, Rail fence cipher, bit manipulation in an Exclusive OR exercise, and hidden messages in the Steganography exercise. (Sorry folks, I usually update the steganography message but there’s no sports right now. The NHL message is from last season.)
Part 2:
You looked at port scanners in chapter 7. Sometimes attackers will scan a network looking for open ports.
To learn a bit more about ports, please read the attached article.
Then have another try at Wireshark. See if you can identify the ports. Put your answers (and screen shots if you can) on a document and upload them here.
For anyone who needs them, I ran the scan and took some screen shots. They are attached.
You may not need all of them but I thought you would like to see a few different packets (from the same scan).
If you look at the packet bytes pane (the one at the bottom), you can see the contents of the packet – the message is not encrypted. Here’s one way someone can intercept and view the contents. Anytime a message is sent in plain text (unencrypted), if captured, it can be read.
Links:
https://courses.ccac.edu/bbcswebdav/pid-6301895-dt-content-rid-30916599_1/courses/20SP-CIT-175-Z03S-416523/20SP-CIT-175-Z03S-416523_ImportedContent_20200110082501/NHL_hidden_message.png
https://courses.ccac.edu/bbcswebdav/pid-6301895-dt-content-rid-30916598_1/courses/20SP-CIT-175-Z03S-416523/20SP-CIT-175-Z03S-416523_ImportedContent_20200110082501/NHL.JPG
https://courses.ccac.edu/bbcswebdav/pid-6301895-dt-content-rid-30916597_1/courses/20SP-CIT-175-Z03S-416523/20SP-CIT-175-Z03S-416523_ImportedContent_20200110082501/hongkong.png
https://courses.ccac.edu/bbcswebdav/pid-6381945-dt-content-rid-31518208_1/courses/20SP-CIT-175-Z03S-416523/Ports%20Assign%20Wireshark%20image%20D.PNG
https://courses.ccac.edu/bbcswebdav/pid-6381945-dt-content-rid-31518207_1/courses/20SP-CIT-175-Z03S-416523/Ports%20Assign%20Wireshark%20image%20C.PNG
https://courses.ccac.edu/bbcswebdav/pid-6381945-dt-content-rid-31518206_1/courses/20SP-CIT-175-Z03S-416523/Ports%20Assign%20Wireshark%20image%20B.PNG
https://courses.ccac.edu/bbcswebdav/pid-6381945-dt-content-rid-31518205_1/courses/20SP-CIT-175-Z03S-416523/Ports%20Assign%20Wireshark%20image%20A.PNG
https://courses.ccac.edu/bbcswebdav/pid-6381945-dt-content-rid-31518205_1/courses/20SP-CIT-175-Z03S-416523/Ports%20Assign%20Wireshark%20image%20A.PNG