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CY-503 (B) RGPV B.Tech

Network Security (NS)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

5 papers, latest Dec 2025

Free
See all 5 papers

Syllabus, notes and important questions for CY-503 (B)

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 Review of Cryptography 11 topics
  • Symmetric Encryption Principles
  • Symmetric Block Encryption Algorithms
  • Random and Pseudorandom Numbers
  • Stream Ciphers and RC4
  • Cipher Block Modes of Operation
  • Approaches to Message Authentication
  • Secure Hash Function
  • Message Authentication Codes
  • Public-Key Cryptography Principles
  • Public-Key Cryptography Algorithms
  • Digital Signatures
Unit 1 notes
Unit 2 Hardware and Software Security 12 topics
  • Hardware Security
  • Smart Cards
  • Biometrics
  • Virtual Private Networks
  • Types of VPNs
  • Trusted Operating Systems
  • Pretty Good Privacy (PGP)
  • Security Protocols
  • Security Socket Layer
  • Transport Layer Security
  • IPSec
  • S/MIME
Unit 2 notes
Unit 3 Intrusion Detection System and Firewalls 18 topics
  • IDS – Infrastructure of IDS
  • Classification of IDS
  • Host‑based IDS
  • Network‑based IDS
  • Anomaly vs Signature Detection
  • Normal Behavior Patterns – Anomaly Detection
  • Misbehaviour Signatures – Signature Detection
  • Parameter Pattern Matching
  • Managing an IDS
  • Malicious Software
  • Safeguards
  • Firewalls
  • Packet‑Filtering Firewalls
  • Stateful Inspection Firewalls
  • Proxy Firewalls
  • Guard
  • Personal Firewalls
  • Limitations of Firewalls
Unit 3 notes
Unit 4 Wireless Security 13 topics
  • Wireless Application Protocol
  • WAP Security
  • Authentication
  • Integrity
  • Confidentiality
  • Security Issues with Wireless Transport Layer Security (WTLS)
  • Wireless LAN
  • WLAN Configuration
  • WLAN Technology Consideration
  • Wireless LAN Security
  • Access Point Security
  • Work‑Station Security
  • Safeguarding Wireless LANs
Unit 4 notes
Unit 5 Web Security 14 topics
  • Client/Server Architecture
  • Security Considerations and Threats
  • Web Traffic Security Approaches
  • SSL/TLS for Secure Web Services
  • The Twin Concept of “SSL Connection” and “SSL Session”
  • SSL Session State
  • SSL Connection State
  • SSL Record Protocol
  • SSL Handshake Protocol
  • S‑HTTP
  • Secure Electronic Transaction (SET)
  • Business Requirements
  • SET Participants
  • SET Transaction Flow
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 4 past CY-503 (B) papers.

Marks asked per paper, by unit

  • Unit 1 Review of Cryptography 37 marks
  • Unit 2 Hardware and Software Security 14 marks
  • Unit 3 Intrusion Detection Systemand Firewalls 16 marks
  • Unit 4 Wireless Security 14 marks
  • Unit 5 Web Security 12 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

  1. Explain the Secure Electronic Transaction (SET) protocol, the security concerns in online financial transactions it addresses, its working with example, and its application in business environment.

    Asked 3 times: 2024, 2023, 2022

  2. Explain public-key cryptographic principles and the construction, working and use of the RSA encryption algorithm with an example.

    Asked 2 times: 2025, 2023

  3. Explain with a neat diagram how PGP provides authentication and confidentiality for securing email communication.

    Asked 2 times: 2024, 2022

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