In this assignment we'll being applying cryptography and cryptanalysis methods. This will require you to understand and identify principles of information assurance and the use of appropriate software tools. Please submit the answers in a .pdf file that includes your name, the assignment number, the original questions, and of course your answers.

1. If you download a file and the source site states that the MD5 checksum of the attached file "Assignment 2.1 - MD5.txt" should be 76fd438c5783ca26247a4e020c05c61c, would you have compelling reason to believe that it has been replaced by malware?

2. The attached file "Assignment 2.2 - Sub Cipher.txt" is the text of the first chapter of an English language book encrypted with a substitution cipher. Using your cryptanalytic skills, what is the title of the book?

3. Theres a message hidden in the attached file "Assignment 2.3 image.png" file. What is the third word?

Extra credit: What are the first 4 characters of blackboard.albany.edu's public key?