CSPP 532 Lecture, Week 2

6/26/01


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Table of Contents

A Brief History of Cryptography

What is cryptography?

How do we encrypt?

Example: Caesar Shift

How could we break this?

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Substitution Cipher

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A harder example

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What have we learned?

The perfect cryptosystem

VigenĖre Cipher

Enigma Machine

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Enigma Key

Navajo Code Talkers

Modern Symmetric Cryptography

Intermission

Key Distribution

Paradigm Shift

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Diffie-Hellman-Merkle (1976)

One-way Functions

Cryptographic Primitives

Trapdoor one-way functions

Idea behind public key

Public Key Cryptography

Digital Signature Scheme

Revolution

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You are the weakest link

Quantum Computation

Where do we go from here?

Recommended Reading

Author: Sandy Kutin

Email: kutin@uchicago.edu

Home Page: http://people.cs.uchicago.edu/~kutin/CSPP532

Other information:
Lecture Notes 6/26/01

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