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CNS-8,9,10,11 Session

This document outlines a presentation on foundations of modern cryptography given by Dr. I. Kala. The presentation covers perfect security, information theory, product cryptosystems, cryptanalysis, and types of cryptanalytic attacks. It includes slides on these topics as well as a quiz and time for feedback and interaction.

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Sadhana V
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45 views36 pages

CNS-8,9,10,11 Session

This document outlines a presentation on foundations of modern cryptography given by Dr. I. Kala. The presentation covers perfect security, information theory, product cryptosystems, cryptanalysis, and types of cryptanalytic attacks. It includes slides on these topics as well as a quiz and time for feedback and interaction.

Uploaded by

Sadhana V
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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PSG Institute of Technology and Applied Research

Neelambur, Coimbatore – 641 062


Department of Computer Science and Engineering

CS8792 Cryptography and


Network Security
Session 8, 9,10,11
Dr.I.Kala
Associate Professor/CSE
PSGiTECH
Outline of the presentation
– Foundations of modern cryptography
• perfect security
• information theory
• product cryptosystem
• cryptanalysis

9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 2


9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 3
Foundations of modern cryptography
Perfect Security

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9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 6
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 7
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 8
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 9
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 10
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 11
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 12
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 13
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 14
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9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 17
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9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 20
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 21
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 22
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 23
9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 24
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Product Cryptosystem

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9/1/2020 CS8792: Cryptography and Network Security / Dr I Kala, Associate Professor/CSE 30
Cryptanalysis

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Types of Cryptanalytic Attacks

• ciphertext only
– only know algorithm / ciphertext, statistical, can identify
plaintext
• known plaintext
– know/suspect plaintext & ciphertext to attack cipher
• chosen plaintext
– select plaintext and obtain ciphertext to attack cipher
• chosen ciphertext
– select ciphertext and obtain plaintext to attack cipher

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QUIZ 1 – ASSESSMENT

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FEEDBACK

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Interaction

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