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Introduction Main Body: What is the history of DES, and why is s - DES studied? How does DES and 3 DES work? Provide an

Introduction

Main Body:

What is the history of DES, and why is s

-

DES studied?

How does DES and

3

DES work? Provide an example of each.

Explain the following ingredients that decide the algorithm in the Fiestel cipher:

Block size Key size

Subkey generation

Round function

Fast software encryption

/

decryption

Ease of Analysis

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