CSC8419 Assignment 2: Cryptography and Security

CSC8419
Assignment 2
Cryptography and Security
Student Name:
Student Number:

Contents
Task 1.........................................................................................................................................2
Task 2.........................................................................................................................................4
Task 4.........................................................................................................................................7
Introduction............................................................................................................................7
Background............................................................................................................................7
References............................................................................................................................10
List of Figures
Figure 1: DES encryption...........................................................................................................8
Figure 2: AES.............................................................................................................................9
1

Task 1
The files should be downloaded from the link: https://goo.gl/8CNeyc. The signature files
MD5 are done with the ISO image.
 At first, list of all the available files in the directory to ensure if everything is operating
correctly.
 Then second, we will verify signatures with the help of free GNU Privacy Guard
mutually for MD5.
 There might be a possibility that public key is not available not the system at first. So
retrieval is done using ID = ‘6294BE9B’.
 Now, downloading of public key is done by using the ID = ‘6294BE9B’.
 Now, signature authentication is done.
2

“Good signature from "Debian CD signing key <debian- [e-mail]>” This will
confirm the validity of image from Debian DVD. The generated fingerprint key can also
be used, i.e., DF9B 9C49 EAA9 2984 3258 9D76 DA87 E80D 6294 BE9B.
 At last, verification of the contents of an ISO image is done to ensure if the image
checksum matches with the checksum file.
3