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Express Learning: Cryptography and Network Security
book

Express Learning: Cryptography and Network Security

by ITL Education Solutions Limited
January 2012
Intermediate to advanced content levelIntermediate to advanced
196 pages
6h 43m
English
Pearson India
Content preview from Express Learning: Cryptography and Network Security

7

Message Authentication and Hash Functions

1. What do you mean by message authentication?

Ans.: Message authentication refers to the mechanism used to ensure that the integrity of the received message has been preserved - that the message has not been altered during transmission. It also assures the receiver that the message has originated from the intended sender and not from any intruder. Thus, a message is said to be authentic if the message has not been altered and has come from the actual sender.

2. What types of attacks are addressed by message authentication?

Ans.: The messages transmitted across a network are subject to various attacks. The types of attacks that are addressed by message authentication are as follows:

   Masquerade: ...

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Publisher Resources

ISBN: 9788131764527