TAILIEUCHUNG - Lecture Network security: Chapter 12 - Dr. Munam Ali Shah

The topic discussed in this chapter are: explore a couple of more examples of shift cipher, continue the discussion on mono-alphabetic cipher with an example will also be discussed, perform a cryptanalysis on a cipher text to reveal the plain text. | Network Security Lecture 12 Presented by: Dr. Munam Ali Shah Part 2 (b) Cryptography as a Network Security Tool Summary of the previous lecture We had overviewed the 3-dimensions of a cryptographic system, ., type of operation to transform the plain text into cipher text, number of keys used and the way in which plain text is processed We also discussed unconditional and computational security. One example of unconditional security is OTP The difference between Cryptanalysis and Brute Force attacks, were also discussed. And lastly, we practically perform cryptography through the Shift Cipher Outlines of today’s lecture We will: Explore a couple of more examples of Shift Cipher Continue the discussion on Mono-alphabetic Cipher with an example will also be discussed Perform a cryptanalysis on a cipher text to reveal the plain text. Objectives You would be able to present an overview of more cryptographic schemes and you will understand the limitation of each scheme. You would be able

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• Network security tool
• Network security
• Lecture Network security
• Computer network
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• cyberspace
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• Wifi hack tool
• Gmail inbox
• system architecture
• network security protection
• Trojans
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• social Engineering
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