Network Security (CY-503 (B)) - Important Questions

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

Discuss the computational hardness assumptions critical to public-key cryptography.

Explain how discrete logarithms are used in cryptographic primitives with an example.

Discuss the significance of pseudo-random generators in secure encryption schemes.

Explain how large integer arithmetic enhances the implementation of public-key cryptosystems.

Explain the working principle of the Feistel network with a block diagram.

Write short notes on collision-resistant hash functions.

Compare and contrast the security properties of ECB versus CBC encryption modes.

Explain how GCM mode simultaneously provides confidentiality and integrity.

Write short notes on hybrid encryption and its role in securing communication.

Compare symmetric encryption with asymmetric encryption, focusing on key management.

Explain the principle behind symmetric and asymmetric encryption. Describe the process of secure message authentication using hash functions with a relevant example.

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

Compare Virtual Private Networks (VPN) with Trusted Operating Systems in terms of their security architecture and applications.

Discuss in detail Biometric Authentication.

Explain the general format of a PGP message with a neat sketch.

Explain transport mode and tunnel mode operations for AH in IPSec.

What is VPN? Write about the different types of VPN's.

Explain transport mode and tunnel mode operations for ESP in IPSec.

Define and classify firewalls and explain packet filtering firewalls.

Describe the difference between Host-based IDS and Network-based IDS.

List the types of firewalls and explain their operational differences with examples.

Describe different types of malicious software and explain how IDS and firewalls help safeguard against them.

Define Intrusion. Discuss Network based Intrusion detection system with a neat sketch.

Explain in detail the types of malicious software.

Write about Host based Intrusion detection systems.

Write the merits and demerits of Firewalls.

Discuss the security challenges associated with Wireless LANs (WLAN security).

Explain the WAP architecture with suitable diagram/example.

Explain WAP security mechanisms with focus on WTLS and how it secures wireless communications.

Describe the security issues and vulnerabilities in WTLS.

Explain about Wireless Application Protocol security.

Explain WLAN protocol stack and MPDU format with suitable diagram.

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.

Outline the SSL Handshake Protocol and explain each step in establishing a secure connection between client and server.

Differentiate between SSL Connection and SSL session. How do these concepts contribute to securing web traffic?

Define SSL. What are the different services provided by SSL Record Protocol?

Explain the working of the polyalphabetic substitution cipher with examples.

Write short notes on Perfect Secrecy and its significance.

Describe the evolution of cryptography from classical to modern techniques.

Analyze the role of one-way functions in securing cryptographic systems.

Write short notes on Quantum Computing and its Implications for Cryptography.

Write short notes on (any four):

Write short notes on any two of the following:

Write short notes on any two of the following.