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1. Assume user A and B are communicating with each other. They are in need to verify the integrity of the message using hash function. User A encrypts only the hash code that was generated by him and sends it to user B. Show how could this be done and communication happen. 2. Now user A has decided to provide confidentiality along with the services offered in Question 1. Illustrate the scenario in all the possible ways. 3. Alice and Bob need to share a secret key for further communication. Show how the key can be shared using symmetric and asymmetric pattern.

1. Assume user A and B are communicating with each other. They are in need to verify the integrity of the message using hash function. User A encrypts only the hash code that was generated by him and sends it to user B. Show how could this be done and communication happen. 2. Now user A has decided to provide confidentiality along with the services offered in Question 1. Illustrate the scenario in all the possible ways. 3. Alice and Bob need to share a secret key for further communication. Show how the key can be shared using symmetric and asymmetric pattern.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1. Assume user A and B are communicating with each other. They are in need to verify the integrity of the message using hash function. User A encrypts only the hash code that was generated by him and sends it to user B. Show how could this be done and communication happen. 2. Now user A has decided to provide confidentiality along with the services offered in Question 1. Illustrate the scenario in all the possible ways. 3. Alice and Bob need to share a secret key for further communication. Show how the key can be shared using symmetric and asymmetric pattern. 4. Show the key distribution scheme in which there is high chance of man-in-the-middle attack with suitable illustrations. 5. Explain what a nonce is and the reason for using a nonce. Discuss how certificates are obtained from certificate authority and the certificates are exchanged between the user.
Transcribed Image Text:1. Assume user A and B are communicating with each other. They are in need to verify the integrity of the message using hash function. User A encrypts only the hash code that was generated by him and sends it to user B. Show how could this be done and communication happen. 2. Now user A has decided to provide confidentiality along with the services offered in Question 1. Illustrate the scenario in all the possible ways. 3. Alice and Bob need to share a secret key for further communication. Show how the key can be shared using symmetric and asymmetric pattern. 4. Show the key distribution scheme in which there is high chance of man-in-the-middle attack with suitable illustrations. 5. Explain what a nonce is and the reason for using a nonce. Discuss how certificates are obtained from certificate authority and the certificates are exchanged between the user.
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