What is history of des and why is s-des studied

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What is the history of DES, and why is s-DES studied?

How does DES and 3DES 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

Reference no: EM132910919

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