Project 1: Block Encryption in CBC Using 3DES

For this project you will solve the problem presented using Figure 7.17 located in our text and write a 2-3 page report that includes the following: 

• 2-3 pages of content minimum (does not include cover, abstract or references pages)
• Paper must conform to full APA guidelines to include a cover page, abstract, headers, introduction, body paragraphs with appropriate headings/subheadings, conclusion, and a reference page.
• All sources must be cited and references. Remember, unless the statement is common knowledge, you must cite and reference your sources.
• You must use at least one peer-reviewed source 
• Ensure you follow academic integrity policies.  

Problem:  You want to build a hardware device to do block encryption in the cipher block chaining (CBC) mode using an algorithm stronger than DES. 3DES is a good candidate. Figure 7.17 shows two possibilities, both of which follow from the definition of CBC. Which of the two would you choose and why: 

1. For security?
2. For performance? 

You must fully explain your justification and reasoning.