Cryptography · Unit 5 · 3 hrs
Authentication
Exam-focused notes for Authentication (Cryptography, CSC327): what the TU syllabus asks and how it has actually been tested, with 5 solved past questions from this unit.
What this unit covers
- Authentication System
- Password Based Authentication
- Dictionary Attacks
- Challenge Response System
- Biometric System
- Needham-Schroeder Scheme
- Kerberos Protocol
Challenge Response System
Define authentication system. Discuss about challenge response system. [5]
An authentication system is a security measure put in place to secure data and systems by requiring additional input beyond username and password for users to access a system. An authentication system consists of five components required for the overall aut...
Full solved answer →Define challenge response system. Why do we need Kerberos? [5]
--- A challenge response system is a handshake authentication process in which the authenticator (server) issues a challenge to the user seeking authentication, and the user must provide a correct response in order to be authenticated. 1. The user requests ...
Full solved answer →Kerberos Protocol
Discuss the working mechanism of kerberos protocol. [5]
Kerberos is a computer network authentication protocol that works on the basis of tickets to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner. It is based on the concept of a trusted third party c...
Full solved answer →Authentication System
Give the formal definition of authentication system. Describe about one way and mutual authentication system. [3257]
An Authentication System is a security measure put in place to secure data and systems by requiring additional input beyond username and password for users to access a system. Formally, an authentication system is defined as a 5-tuple: $$\text{Authenticatio...
Full solved answer →Define authentication system. Illustrate the need of mutual authentication over one way authentication with an example. [5]
--- An authentication system is a security mechanism that verifies the identity of a user, process, or device before granting access to a system or resource. It ensures that the entity claiming an identity is genuinely who they say they are. Authentication ...
Full solved answer →Make Unit 5 stick
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