Cryptography & Network Security | Most Important Questions | Score 55+ marks in AKTU Exams 2025

This video covers the most important and highly repeated questions of Cryptography & Network Security for AKTU B.Tech 4th year students.
These questions are directly selected from all five units of CNS and are very scoring for final university examinations. Preparing these questions can easily help students score 55+ marks in AKTU exams.

Unit 1 Important Questions:
→ CIA Triad, Cryptanalysis, Active vs Passive Attacks, Confusion & Diffusion concepts
→ Monoalphabetic vs Polyalphabetic Cipher
→ Playfair Cipher, Substitution vs Transposition
→ DES algorithm, Double DES & Triple DES


Cryptography & Network Security…

Unit 2 Important Questions:
→ Euclid GCD, Euler Totient
→ AES architecture + Difference AES vs DES
→ RSA complete numerical example
→ CRT, Fermat theorem, Miller Rabin test
→ Groups, Rings, Modular inverse


Cryptography & Network Security…

Unit 3 Important Questions:
→ MAC, Hashing, SHA-512
→ Digital Signature & DSA
→ SHA-1 & Birthday Attack


Cryptography & Network Security…

Unit 4 Important Questions:
→ X.509 Certificate
→ S/MIME vs PGP
→ Kerberos
→ Diffie-Hellman Numerical
→ PGP messaging steps


Cryptography & Network Security…

Unit 5 Important Questions:
→ SET & Dual Signature
→ IDS, Firewall
→ SSL Handshake
→ IPSec AH & ESP


This video is designed for:
→ AKTU B.Tech 4th Year CNS Exam
→ Cryptography & Network Security preparation
→ Students targeting 55+ marks
→ University theory + viva


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