CUET PG PYQs for Cryptography and Network Security with Solutions: Practice CUET PG Previous Year Questions

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Cryptography and Network Security is an important topic in the Data Science A.I Cyber Security and Computer Sci. section in CUET PG exam. Practising this topic will increase your score overall and make your conceptual grip on CUET PG exam stronger.

This article gives you a full set of CUET PG PYQs for Cryptography and Network Security with explanations for effective preparation. Practice of CUET PG Data Science A.I Cyber Security and Computer Sci. PYQs including Cryptography and Network Security questions regularly will improve accuracy, speed, and confidence in the CUET PG 2026 exam.

CUET PG PYQs for Cryptography and Network Security with Solutions

1.
Which is not a requirement of digital signatures:
- Having a public-private key pair
- Being computationally feasible
- Being easily recognizable
- Being easily verifiable
View Solution
2.
The attributes in IPsec for Authentication Header protocol in transport mode from left to right are :
A. IPsec header
B. Padding
C. Authentication header
D. Rest of original packet
Choose the correct answer from the options given below :
- D, C, A, B
- A, C, D, B
- D, C, B, A
- A, C, B, D
View Solution
3.
In which theorem \(a^{p−1} = 1 \) mod p where p is prime and a is a positive integer not divisible by p
- Euler’s theorem
- Wilson’s theorem
- Chinese Remainder theorem
- Fermat’s theorem
View Solution
4.
Computation of the discrete logarithm is the basis of the cryptographic system:
- Symmetric key cryptography
- Asymmetric cryptography
- Diffie-Hellman key exchange
- Secret key cryptography
View Solution
5.
Which of the following statement correctly differentiates substitution and transposition ciphers ?
- Substitution changes the order of symbols; transposition replaces symbol
- Both change symbol order and values simultaneously
- Substitution replaces symbol with others; transposition rearranges their position
- Substitution is always weaker than transposition in modern cryptography
View Solution
6.
Rail fence technique is an example of:
- Substitution Cipher
- Transposition Cipher
- Product Cipher
- Caesar Cipher
View Solution
7.
In a secure communication model, if an attacker intercepts a message and replaces it with a fake one before forwarding it, this attack is best classified as :
- Replay attack
- Masquerade attack
- Man in the middle
- Denial of service
View Solution
8.
In the DES algorithm, the round input is 32 bits, which is expanded to 48 bits via:
- Scaling of the existing bits
- Duplication of the existing bits
- Addition of zeros
- Addition of ones
View Solution
9.
Which type of firewall filters is based on application - layer data such as URL and HTTP headers ?
- Packet-filtering firewall
- Stateful inspection firewall
- Application proxy firewall
- Circuit level gateway
View Solution
10.
The best-known multiple-letter encryption cipher is:
- Caesar cipher
- Hill cipher
- Playfair cipher
- Block cipher
View Solution
11.
Consider the following statements about symmetric encryption :
A. Same key for encryption and decryption

B. Faster than asymmetric encryption

C. Key distribution is simpler

D. Stream ciphers encrypt one bit byte at a time

E. Block ciphers operate on groups of bits

Choose the correct answer from the options given below :
- A, B, C, E only
- B, C, D only
- A, C, D, E only
- A, B, D, E only
View Solution

12.
Match List - I with List - II.
List - I List - II
A. Caesar Cipher I. Substitution cipher using \(5 \times 5\) matrix
B. Playfair Cipher II. Polyalphabetic cipher using matrix multiplication
C. Hill Cipher III. Monoalphabetic cipher using fixed shift
D. Vigenère Cipher IV. Polyalphabetic cipher using keyword repetition
Choose the correct answer from the options given below:

CUET PG PYQs for Cryptography and Network Security with Solutions: Practice CUET PG Previous Year Questions

CUET PG PYQs for Cryptography and Network Security with Solutions

1.
Which is not a requirement of digital signatures:

2.
The attributes in IPsec for Authentication Header protocol in transport mode from left to right are :
A. IPsec header
B. Padding
C. Authentication header
D. Rest of original packet
Choose the correct answer from the options given below :

3.
In which theorem \(a^{p−1} = 1 \) mod p where p is prime and a is a positive integer not divisible by p

4.
Computation of the discrete logarithm is the basis of the cryptographic system:

5.
Which of the following statement correctly differentiates substitution and transposition ciphers ?

6.
Rail fence technique is an example of:

7.
In a secure communication model, if an attacker intercepts a message and replaces it with a fake one before forwarding it, this attack is best classified as :

8.
In the DES algorithm, the round input is 32 bits, which is expanded to 48 bits via:

9.
Which type of firewall filters is based on application - layer data such as URL and HTTP headers ?

10.
The best-known multiple-letter encryption cipher is:

Comments

dOGVmW

List - I		List - II
A.	Caesar Cipher	I.	Substitution cipher using \(5 \times 5\) matrix
B.	Playfair Cipher	II.	Polyalphabetic cipher using matrix multiplication
C.	Hill Cipher	III.	Monoalphabetic cipher using fixed shift
D.	Vigenère Cipher	IV.	Polyalphabetic cipher using keyword repetition

CUET PG PYQs for Cryptography and Network Security with Solutions

1. Which is not a requirement of digital signatures:

2.The attributes in IPsec for Authentication Header protocol in transport mode from left to right are : A. IPsec header B. Padding C. Authentication header D. Rest of original packet Choose the correct answer from the options given below :

3.In which theorem \(a^{p−1} = 1 \) mod p where p is prime and a is a positive integer not divisible by p

4.Computation of the discrete logarithm is the basis of the cryptographic system:

5.Which of the following statement correctly differentiates substitution and transposition ciphers ?

6.Rail fence technique is an example of:

7.In a secure communication model, if an attacker intercepts a message and replaces it with a fake one before forwarding it, this attack is best classified as :

8.In the DES algorithm, the round input is 32 bits, which is expanded to 48 bits via:

9.Which type of firewall filters is based on application - layer data such as URL and HTTP headers ?

10.The best-known multiple-letter encryption cipher is:

Comments

dOGVmW

1.
Which is not a requirement of digital signatures:

2.
The attributes in IPsec for Authentication Header protocol in transport mode from left to right are :
A. IPsec header
B. Padding
C. Authentication header
D. Rest of original packet
Choose the correct answer from the options given below :

3.
In which theorem \(a^{p−1} = 1 \) mod p where p is prime and a is a positive integer not divisible by p

4.
Computation of the discrete logarithm is the basis of the cryptographic system:

5.
Which of the following statement correctly differentiates substitution and transposition ciphers ?

6.
Rail fence technique is an example of:

7.
In a secure communication model, if an attacker intercepts a message and replaces it with a fake one before forwarding it, this attack is best classified as :

8.
In the DES algorithm, the round input is 32 bits, which is expanded to 48 bits via:

9.
Which type of firewall filters is based on application - layer data such as URL and HTTP headers ?

10.
The best-known multiple-letter encryption cipher is: