Cryptography · Unit 6 · 6 hrs
Network Security and Public Key Infrastructure
Exam-focused notes for Network Security and Public Key Infrastructure (Cryptography, CSC327): what the TU syllabus asks and how it has actually been tested, with 9 solved past questions from this unit.
What this unit covers
- Overview of Network Security
- Digital Certificates and X.509 certificates
- Certificate Life Cycle Management
- PKI trust models
- PKIX
- Email Security: Pretty Good Privacy (PGP)
- Secure Socket Layer (SSL) and Transport Layer Security (TLS)
- IP Security (IPSec)
- Firewalls and their types
Firewalls and their types
List and explain the types of firewall. [5]
--- A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It establishes a barrier between a trusted internal network and untrusted external networks. --- - Operates a...
Full solved answer →What is the use of firewall? How circuit level gateway differs from stateful inspection firewall? [5]
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Its main uses include: - Access Control: Blocks unauthorized access to the internal network while allowing legiti...
Full solved answer →What is the task of a firewall? List the elements of X.509. [5]
--- A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Its primary tasks are: 1. Access Control: Permits or denies traffic between networks (e.g., trusted internal ...
Full solved answer →Certificate Life Cycle Management
What is digital certificate? Discuss the certificate life cycle. [5]
A digital certificate is a certificate issued by a Certificate Authority (CA) to verify the identity of the certificate holder. The CA issues an encrypted digital certificate containing the applicant's public key along with a variety of other identification...
Full solved answer →List the stage of certificate life cycle. What are the types of firewalls? [5]
--- A digital certificate (such as an X.509 certificate) issued by a Certificate Authority (CA) goes through the following stages during its life cycle: The entity (user, server, or organization) submits a request to the Certificate Authority (CA) along wit...
Full solved answer →IP Security
Describe about IPSec. List the five services of PGP. [5]
IPSec is a suite of protocols designed to provide security at the network layer (IP layer) of the Internet. It provides security services for IP datagrams by authenticating and/or encrypting each IP packet in a communication session. IPSec operates in two m...
Full solved answer →Email Security
Describe the services provided by Pretty Good Privacy protocol to secure email. [5]
Pretty Good Privacy (PGP) is an open-source, freely available software package designed for email security. It provides confidentiality and authentication services that can be used for electronic mail and file storage applications. PGP operates through 5 ma...
Full solved answer →PKI trust models
Describe the PKI trust model. [5]
Public Key Infrastructure (PKI) is a framework that manages the creation, distribution, storage, and revocation of digital certificates. The PKI trust model defines how trust is established and maintained among entities using public key certificates. --- Th...
Full solved answer →Secure Socket Layer
Define SSL protocol. Mention the services provided by PGP. [5]
--- Definition: SSL (Secure Sockets Layer) is a protocol designed to provide secure communication over the Internet between a client and a server. It operates between the application layer and the transport layer (TCP/IP) and ensures that data transmitted b...
Full solved answer →Make Unit 6 stick
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