What is message authentication? Define the classes of message authentication function?
Subject Computer and Network Security
NU Year Set: 3.(a) Marks: 1+4 Year: 2017

Message authentication ensures that the message has been sent by a genuine identity and not by an imposter.

 classes of message authentication function

Cryptographic Hash Functions

Keyed Hash Functions

Unkeyed and Keyed Hash Functions

Security of Hash Functions

One-way or Preimage Resistance

Second Preimage Resistance

Collision Resistance

Generic Attacks to Hash Functions

Random Second Preimage Attack

Message Digest Functions



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