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EC2035 Cryptography and Network Security - Lecture Notes for Unit 2 - Edition 2014

university:anna university
subject code:EC2035
subject:cryptography and network security
content:EC2035-cryptography and network security-lecture notes for unit 2-edition 2014


 Public-key encryption helps address key distribution problems 
 Have two aspects of this: 
  •  Distribution of public keys 
  •  Use of public-key encryption to distribute secret keys 
Distribution of Public Keys
 Distribution of Public keys can be considered as using one of: 
 public announcement 
 publicly available directory 
 public-key authority 
 public-key certificates 
a. Public Announcement 
 Users distribute public keys to recipients or broadcast to community at large 
 eg. append PGP keys to email messages or post to news groups or email list 
 Major weakness is forgery 
 Anyone can create a key claiming to be someone else and broadcast it 
 until forgery is discovered can masquerade as claimed user 

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.pdf   unit-2 peri.pdf (Size: 362.91 KB / Downloads: 670)

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