2.5.2.6 Packet Tracer – Exploring File and Data Encryption (Answers Solution)

2.5.2.6 Packet Tracer – Exploring File and Data Encryption (Answers)

Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only.

Addressing Table

Device Private IP Address Public IP Address Subnet Mask Site
FTP/Web Server 10.44.1.254 209.165.201.3 255.255.255.0 Metropolis Bank HQ
Mary 10.44.3.101 N/A 255.255.255.0 Healthcare at Home
Bob 10.44.1.3 N/A 255.255.255.0 Metropolis Bank HQ

Objectives

Part 1: Locate the FTP Account Credentials for Mary’s Laptop
Part 2: Upload Confidential Data using FTP
Part 3: Locate the FTP Account Credentials for Bob’s PC
Part 4: Download Confidential Data using FTP
Part 5: Decrypt the Contents of the clientinfo.txt File

Background

In this activity, you will access the encrypted contents of multiple files and transfer a file across the Internet to a centralized FTP server. Another user will then download the file from the FTP server and decrypt the files’ contents. The IP addressing, network configuration, and service configurations are already complete. You will use the client devices in the differing geographic regions to transfer a file with encrypted data to another device.

Part 1: Locate the FTP Account Credentials for Mary’s Laptop

Step 1: Access the text document on Mary’s laptop.

a. Click the Healthcare at Home site and then click the laptop Mary.

b. Click the Desktop tab and then click Text Editor.

c. In the Text Editor window, click File > Open.

d. Click the document txt and click OK.

Step 2: Decrypt Mary’s FTP account information.

a. Highlight all the text from the txt file and copy it.

b. Open a web browser on your personal computer and browse to the website https://encipher.it

c. Click the whitespace on the right of the website and paste in the encrypted text.

Click the Decipher It button and use the decryption password maryftp123 to decrypt the encrypted text. Click Decrypt.

What is the username and password for Mary’s FTP account?
username: mary password: cisco321

Part 2: Upload Confidential Data using FTP

Step 1: View the confidential document on Mary’s Laptop.

a. Click the Healthcare at Home site and then click the Laptop Mary.

b. Click the Desktop tab and then click Text Editor.

c. In the Text Editor window, click File > Open.

d. Click on the document clientinfo.txt and click OK.

What form is the data in?
Encrypted form

Step 2: Remotely connect to the FTP server.

a. Within the Healthcare at Home site, click the Laptop Mary.

b. Click the Desktop tab and then click Command Prompt.

c. Connect to the FTP/Web server at Metropolis Bank HQ by entering ftp 209.165.201.3 in the command prompt.

Enter the username/password credentials located in Part 1 Step 2

Step 3: Upload a file to the FTP server.

a. At the ftp> prompt, enter the command dir to view the current files stored on the remote FTP server.

b. Mary has a file containing encrypted healthcare client information. Upload the txt file to the FTP server by entering the command put clientinfo.txt.

c. At the ftp> prompt, enter the command dir and verify the txt file is now on the FTP server.

If cyber criminals were to capture the file transfer crossing the Internet, what would be in clear text?
The username: mary password: cisco321 for the FTP connection are in clear text but the contents of the document are encrypted.

Part 3: Locate the FTP Account Credentials for Bob’s PC

Step 1: Access the text document on Bob’s PC.

a. Click the Metropolis Bank HQ site and then click the PC Bob.

b. Click the Desktop tab and then click Text Editor.

c. In the Text Editor window, click File > Open.

d. Click the document txt and click OK.

Step 2: Decrypt Bob’s FTP account information.

a. Highlight all the text from txt file and copy it.

b. Open a web browser on your personal computer and browse to the website https://encipher.it

c. Click the whitespace on the right of the website and paste in the encrypted text.

d. Click Decipher It button and use the decryption password bobftp123 to decrypt the encrypted text. Click Decrypt.

What is the username and password for Bob’s FTP account?
username: bob password: ninja123

Part 4: Download Confidential Data using FTP

Step 1: Remotely connect to the FTP server.

a. Within the Metropolis Bank HQ site, click the PC Bob.

b. Click the Desktop tab and then click Command Prompt.

c. Connect to the FTP/Web server within the Metropolis Bank HQ by entering ftp 10.44.1.254 in the command prompt.

d. Enter the username/password credentials located in Part 3 Step 2

Step 2: Download the file to Bob’s PC.

a. At the ftp> prompt, enter the command dir to view the current files stored on the remote FTP server.

b. Mary had uploaded the clientinfo.txt file containing encrypted healthcare client information.

Download the clientinfo.txt file to Bob’s PC by entering the command get clientinfo.txt.

c. At the ftp> prompt, enter the command quit.

d. At the PC> prompt, enter the command dir and verify the txt file is now Bob’s PC.

If cyber criminals were to capture the file transfer crossing the Internet, what would be in clear text?
The username: bob password: ninja123 for the FTP connection are in clear text but the contents of the document are encrypted.

Part 5: Decrypt the Contents of the clientinfo.txt File

Step 1: Receive the decryption key from Mary.

a. Within the Metropolis Bank HQ site, click the PC Bob.

b. Click the Desktop tab and then click Email.

c. In the Email window, click Receive.

d. Click on the Email with the subject “Decryption Key” and record the decryption key below.

What is the decryption key to access the confidential information in the clientinfo.txt file?
cisco123

Step 2: Decrypt the contents of the clientinfo.txt file.

a. Within the Metropolis Bank HQ site, click the PC Bob.

b. Click the Desktop tab and then click Text Editor.

c. In the Text Editor window, click File > Open.

d. Click the document txt and click OK.

e. Highlight all the text from the txt file and copy it.

f. Open a web browser on your personal computer and browse to the website https://encipher.it

g. Click the whitespace on the right of the website and paste in the encrypted text.

Click Decipher It button and use the decryption password from Mary’s email to decrypt the encrypted text. Click Decrypt.

What is the first account name in the clientinfo.txt file?
Plato X. Riggs

Suggested Scoring Rubric

Activity Section Question Location Possible Points Earned Points
Part 1: Locate the   FTP account credentials for Mary’s laptop Step 2 2
Part 2: Upload   confidential data using FTP Step 1 2
Step 3 2
Part 3: Locate the   FTP account credentials for Bob’s PC Step 2 2
Part 4: Download   confidential data using FTP Step 2 2
Part 5: Decrypt   the contents of the clientinfo.txt file Step 1 2
Step 2 2
Questions 14
Packet Tracer Score 86
Total Score 100

 


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