B.TechSemester 72024-25Cryptography And Network SecurityKCS074
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Cryptography And Network Security (KCS074) - AKTU Question Paper 2024-25

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Cryptography And Network Security Previous Year Question Paper for B.Tech Semester 7, academic session 2024-25. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 7
Session:2024-25
University:AKTU / UPTU

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Questions Asked in 2024-25

Cryptography And Network Security (KCS074) — complete question paper · 100 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 10 = 20
  • a
    Outline the key principles of security
  • b
    Distinguish between active and passive attacks
  • c
    Determine GCD of (1970, 1066) usi ng Euclid’s algorithm
  • e
    Discuss Public Key Infrastructure (PKI)
  • f
    Explain Birthday attack
  • g
    Explain E-mail security
  • h
    List out some functions of PGP. 4 K1 i. Differentiate transport and tunnel mode in IPsec. 5 K2 j. Distinguish between Logic B omb and Trojan Horse
Section BAttempt any three of the following: 10 x 3 = 20
  • a
    Illustrate Substitution techni ques and Transposition techniq ues under classical encryption
  • b
    Explain the Advanced Encrypti on Standard (AES) algorithm, providing
  • a
    clear diagram that illustrates its architecture
  • c
    Illustrate the idea of Digita l Signature for authentication. D i s c u s s signing & verifying process of D igital Signature Algorithm (DSA ) in detail with suitable steps
  • d
    Explain the full-service Kerb eros environment. Determine the principal differences between version 4 and version 5 of Kerberos
  • e
    Explain the concept of IP se curity. Explain the role of AH and ESP
Section CAttempt any one part of the following: 10 x 1 = 10
  • a
    Illustrate the DES algorithm with the help of block diagram. List the strength of DES. Discuss the requirement of Double and Triple DES
  • b
    Explain Vigenère cipher and en crypt the following message "Life is full of surprises” using the key – “HEALTH”
  • a
    Compute the multiplicative i nverse of 11 mod 26. Also state the Extended Euclidian Algorithm
  • b
    Apply Miller-Rabin primality te st to test the primality of t he number n=37. Write the pseudo code for Miller Rabin primality testing
  • a
    Explain the concept of MAC. D iscuss the working of MAC with suitable block diagram
  • b
    Discuss SHA- 512 with all required steps, round function &am p; block diagram
  • a
    Determine the role of X.509 certificate in cryptography. Discuss X.509 certificate in detail
  • b
    Illustrate the various servic es supported by S/MIME. Explain how S/MIME supports these services
  • a
    Discuss the concept of dual signature in context of Secure E lectronic Transaction (SET). Briefly desc ribe the sequence of events tha t are required for a SET transaction
  • b
    Discuss the difference betwee n SSL connection and SSL sessio n. Discuss SSL protocol architecture

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KCS074

Questions that appeared in more than one session, found by comparing 4 years of Cryptography And Network Security papers (2021-22, 2022-23, 2023-24, 2024-25)

3x

Determine GCD of (1970, 1066) usi ng Euclid’s algorithm

Appeared in: 2022-23 · 2023-24 · 2024-25

3x

Explain Birthday attack

Appeared in: 2022-23 · 2023-24 · 2024-25

3x

Illustrate the idea of Digita l Signature for authentication. D i s c u s s signing & verifying process of D igital Signature Algorithm (DSA ) in detail with suitable steps

Appeared in: 2022-23 · 2023-24 · 2024-25

3x

Discuss SHA- 512 with all required steps, round function &am p; block diagram

Appeared in: 2022-23 · 2023-24 · 2024-25

2x

Explain the full-service Kerb eros environment. Determine the principal differences between version 4 and version 5 of Kerberos

Appeared in: 2022-23 · 2024-25

2x

Explain the concept of MAC. D iscuss the working of MAC with suitable block diagram

Appeared in: 2022-23 · 2024-25

2x

Discuss the concept of dual signature in context of Secure E lectronic Transaction (SET). Briefly desc ribe the sequence of events tha t are required for a SET transaction

Appeared in: 2022-23 · 2024-25

Cryptography And Network Security — Other Year Papers

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