Cyber Security - Lab 3

 

Practical No.	Practical Name	Session
1	Determining which cipher is used in HTTPS client	Session 1
2	How to find the Cipher in browser
3	Converting a plain text to cipher text and vice versa using DES and AES Algorithms.	Session 2
4	Calculating hash value using MD5 & SHA1 Algorithm.
5	Creating and verifying a digital signature.	Session 3

Practical Session 1 Determining which cipher is used in HTTPS client

Practical Title: Determining which cipher is used in HTTPS client

Problem statement   Need to Determining which cipher is used in HTTPS client.

Instructions   ·         Install the Wireshark

Objective: By the end of this practical, you will be able to successfully Determine which cipher is used in HTTPS client.   Software/s required, if any: 1. Wireshark Hardware required, if any:  NA External references, any https://www.ibm.com/support/pages/determining-which-cipher-used-https-client-server-communications#:~:text=6)%20Double%20click%20the%20line,suites)%20that%20the%20client%20supports

Practical Session 2 How to find the Cipher in browser

Practical Title: Find the Cipher in browser

Problem statement   Determining the cipher through browser itself.

Instructions ·         NA

Objective: By the end of this practical, you will be able to determine the cipher through browser. Software/s required, if any: 1. Web Browser Hardware required, if any: NA External references, any https://helpcenter.gsx.com/hc/en-us/articles/207831828-How-to-identify-the-Cipher-used-by-an-HTTPS-Connection

 

Practical Session 3 Converting a plain text to cipher text and vice versa using DES and AES Algorithm.

Practical Title: Cryptographic Operations

Problem statement   Converting a plain text to cipher text and vice versa using DES and AES Algorithm.

Instructions ·         Download the tool named as Cryptool. ·         Install it in your windows machine.

Objective: By the end of this practical, you will be able to convert plain text into cipher text. Software/s required, if any: 1. CrypTool Hardware required, if any: NA External references, any : No

 

 

Download & Install Cryptool

Please 

Click on the downloaded file to initiate the installation process.

Upon Successful Installation you'll get the following screen

And 3 tools installed and ready to be used in the start menu

Analysis No:1

AES

Analysis No:2 Encrypt & Decrypt

Encrypt and Decrypt the documents found in the examples and create your own document and explore.

 

Watch the animation session for more information on how data is encrypted:

https://www.cryptool.org/en/cto/aes-animation

 

Practical Session 4 Calculating hash value using MD5 & SHA1 Algorithm.

Practical Title: Cryptographic Operations

Problem statement  Calculating hash value using MD5 & SHA1 Algorithm.

Instructions ·         Download the tool named as Cryptool. ·         Install it in your windows machine. ·         Go through by both the algorithms theoretically as well.

Objective: By the end of this practical, you will be able to calculate hash value. Software/s required, if any: 1. CrypTool Hardware required, if any: NA External references, any : No

  

HASH 

Hash is a concept that is used to determine the originality and confidentiality of any file by analyzing the difference between 2 files, e.g, A word document of 100 characters or a digital signature, or an encryption key in a portable device - if they are modified, tampered or has it undergone any changes all these could be analyzed without opening the files.

 

Practical Session 5 Creating and verifying a digital signature.

Practical Title: Cryptographic Operations

Problem statement  Creating and verifying a digital signature.

Instructions ·         Download the tool named as Cryptool. ·         Install it in your windows machine.

Objective: By the end of this practical, you will be able to create and verify your own digital signatures. Software/s required, if any: 1. CrypTool Hardware required, if any: NA External references, any : No