Important RGPV Question
CS-703 (A) Cryptography & Info Security
VII Sem, CS
UNIT-I
Q.1 Describe Fermat’s little theorem with an example. (RGPV Nov 2023)
Q.2 Define Cryptanalysis. Explain the concept of cryptanalysis on substitution cipher. (RGPV Nov 2023)
Q.3 Illustrate DES algorithm with neat diagram. Explain S-box importance in DES. (RGPV Nov 2023)
Q.4 How do you convert a block cipher into a stream cipher by using the Cipher Feedback (CFB) mode? Explain. (RGPV Nov 2022)
Q.5 Explain the concept of Cryptanalysis and Brute force attack. (RGPV Nov 2022)
Q.6 Explain the steps for the Key Generation of DES algorithms. (RGPV Nov 2022)
UNIT-II
Q.1 How to establish a shared secret between two parties using Diffie-Hellmann key exchange algorithm? Explain.
(RGPV Nov 2023)
Q.1 Explain RSA algorithm? Give an example of encryption and decryption using RSA? (RGPV Nov 2023)
Q.2 Describe the Schnorr Identification Scheme in detail. (RGPV Nov 2023)
Q.3 Give the structure of AES. Explain how Encryption/Decryption is done in AES. (RGPV Nov 2022)
Q.4 State Chinese Rernainder theorem and find X for the given set of congruent equations using CRT.
(RGPV Nov 2022)
X=1(mod 5)
X=2(mod 7)
X=3(mod 9)
X=4(mod 11)
UNIT-III
Q.1 What are the types of attacks addressed by message authentication? What are the two levels of functionality the comprise a message authentication or digital signature mechanism? (RGPV Nov 2023)
Q.2 Describe the Digital Signature Standard (DSS) in detail. (RGPV Nov 2023)
Q.3 Explain in short different method of distribution of public key management. (RGPV Nov 2022)
Q.4 User A and B exchange the key using Diffie-Hellman algorithm. Assume a =5. q = 11, XA = 2 and XB = 3. Find YA, YB and K. (RGPV Nov 2022)
Q.5 What is MDS? Explain MD5 with neat and clean diagram. (RGPV Nov 2022)
Q.6 Explain the Secure Hash Algorithm (SHA) with their Merit and Demerit. (RGPV Nov 2022)
UNIT-IV
Q.1 What is Firewall? Explain different types of firewalls in detail. (RGPV Nov 2023)
Q.2 Write about the usage of Session keys, Public and Private keys in PGP. (RGPV Nov 2023)
Q.3 Analyze the Cryptographic algorithms used in S-MIME. Explain S-MIME certification processing. (RGPV Nov 2023)
Q.4 Discuss about Encapsulating Security Payload. (RGPV Nov 2023)
Q.5 Why does PGP compress the message? What are the reasons for compressing the signature but before encryption? (RGPV Nov 2022)
Q.6 What is a Honeypot? Explain types of honeypot. (RGPV Nov 2022)
UNIT-V
Q.1 Explain different types of DoS attack understanding tools. (RGPV Nov 2023)
Q.2 What is Steganography? Explain different types of Steganography. (RGPV Nov 2023)
Q.3 Explain in short different types of DoS Attack Understanding Tools. (RGPV Nov 2022)
Q.4 Explain in short different types of Trojans detection tools. (RGPV Nov 2022)
EXTRA QUESTIONS
Q.1 Write short notes on any Two: (RGPV Nov 2023)
i) Block Cipher
ii) Hash Function
iii) Transport Layer Security
iv) Foot Printing Tools
Q.2 Explain the sequence of steps used in Secure Socket Layer handshake Protocol for establishing a new session. Draw a diagram which shows the action of Handshake Protocol. (RGPV Nov 2022)
Q.3 Write short notes on following(Any two): (RGPV Nov 2022)
a) Firewall and its types.
b) Digital Signature Standard (DSS)
c) Triple DES
d) Schnorr Identification Scheme with the discrete logarithm
— Best of Luck for Exam —
