University of Maryland Global Campus Ciphers & Confidentiality Discussion

Question Description

Part A:

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

    Part B: In 3 to 4 Paragraphs

The National Institute of Standards and Technology (NIST) created a procedure to select a symmetric-key encryption algorithm to protect sensitive federal information. The Advanced Encryption Standard (AES) is a standard used by the U.S. government. It was announced by NIST after 5 years of a standardization process, in which many designs were evaluated before the solution was selected.

  • Based on your understanding of how AES was chosen, what is your opinion of the criteria used?
  • Why do you think these criteria were important?
  • What do you think about the effectiveness and ease of use of AES?

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