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Assignment - PGP CS337

This document outlines an assignment for a Network Security course focused on using Pretty Good Privacy (PGP) to secure emails. It details the process of creating a file for encryption, generating an RSA key, exporting the public key, and performing encryption and decryption of a text file. The assignment is submitted by a student named Abdulkreem Alshunifi and is due on May 14, 2024.

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45 views8 pages

Assignment - PGP CS337

This document outlines an assignment for a Network Security course focused on using Pretty Good Privacy (PGP) to secure emails. It details the process of creating a file for encryption, generating an RSA key, exporting the public key, and performing encryption and decryption of a text file. The assignment is submitted by a student named Abdulkreem Alshunifi and is due on May 14, 2024.

Uploaded by

flawgy0
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Al-Imam Mohammad Ibn Saud Islamic University

College of Computer and Information Sciences

Computer Science Department

Course Title Network Security


Course Code CS 337
Course Instructor Dr. Feras Aljumah

Assignment 1
Submission Date: 2024/5/14

Section :171

Student name:
Abdulkreem Alshunifi
441016459

1
Introduction to PGP Assignment:
In this assignment, you will learn how to protect your emails using
Pretty Good Privacy (PGP).
PGP is a technology that encrypts and signs your emails to keep them
safe from prying eyes and ensure the confidentiality, integrity, and
authenticity of your emails.

First, we create a file:


file named "kreem.txt" and put the text "abdulkreem" inside the file.
This is a file we will use for encryption and decryption.

2
generate-key:

here will use (gpg--full-generate-key)

Please select what kind of key you want:


Your selection: RSA

RSA keys may be between 1024 and 4096 bits long.


keysize: (3072)

Please specify how long the key should be valid.


Key is valid for: key does not expire.

GnuPG needs to construct a user ID to identify your key.


Real name: abdulkreem alshunifi
Email address: k2-u@hotmail.com

3
Passphrase:
a passphrase for a key is like a password that you set to protect your private key
in encryption systems, adding an extra layer of security.
Our Passphrase is "VoiDNeT1" .

4
Here our key:

5
create a file for key:
The file "myKey.txt" we created is empty because we plan to use it for a key.

Export public key:


We use (gpg –export -a -o myKey.txt k2-u@hotmail.com).

6
Encryption:
Here, we encrypt the file by using the key.
Now we have a new encrypted file named "kreem.txt.gpg" and the original
unencrypted file "kreem.txt".

Delete file:
(rm kreem.txt)
Here we delete the original unencrypted file "kreem.txt".
Now we only have the encrypted file "kreem.txt.gpg".

7
Decryption:
(gpg -d kreem.txt.gpg > krem.txt)
Here, we decrypt "kreem.txt.gpg" and save it as a new file named "krem.txt".
He will ask about passphrase "VoiDNeT1".

Here, you'll see the file, and the encrypted text was
"abdulkreem".

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