cryptography

Using the APA writing style, write a 2–3 page paper that answers the questions below. Be prepared to fully support your answers. Explain in your own words the following: 

·  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

Please submit your assignment.