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-\documentclass[11pt]{article}
-\usepackage{fullpage}
-\usepackage{times}
-
-\begin{document}
-\begin{center}
-CSci 5271 Fall 2021 Exercise Set 3 answers template
-\end{center}
-
-Please use this document as a template for submitting your answers to
-exercise set 3. (This template is available from the course web site
-in either LaTeX or Google Doc formats). Type your answers on each page
-after the question prompt (you can use additional pages, though that
-we expect that would rarely be required). If you can write all your
-answers electronically, please do so and export to a PDF to submit.
-If you would prefer to hand-draw figures, you can also submit a scan.
-
-Please ensure that the names and UMN email addresses of all of your
-group members are recorded on Gradescope, and also confirm them below:
-
-\vspace{10pt}
-
-\begin{tabular}{|p{2.6in}|p{2.6in}|}\hline
-Name & UMN email address\\\hline
-Matt Strapp & strap012@umn.edu\\\hline 
-
-\end{tabular}
-
-\vspace{10pt}
-
-Question 1 (Caesar's block cipher, 30 pts):
-
-Part 1(a), CCEA2 $>$ CCEA1?
-
-No. An 8-bit block size can be easily broken, regardless of key size.
-
-\vspace{0.5in}
-
-Part 1(b), any 8-bit-block block cipher
-
-
-\newpage
-
-Part 1(c), ECB mode
-
-\vspace{1.5in}
-
-Part 1(d), CTR mode
-
-\vspace{1.5in}
-
-Part 1(e), CBC mode
-
-\vspace{1.5in}
-
-Part 1(f), OFB mode
-
-\newpage
-
-Part 1(g), weakness of CCEA3
-
-\newpage
-
-Question 2 ((Mis-)using message authentication codes, 26 pts):
-
-Part 2(a), CBC-MAC
-
-\vspace{3in}
-
-Part 2(b), hashing and AES-CTR
-
-\newpage
-
-Question 3 (Protocol (an)droids, 24 pts):
-
-Part 3(a), simpler attack
-
-\vspace{3in}
-
-Part 3(b), second attack
-
-\newpage
-
-Question 4 (Hashing and signing, 20 pts):
-
-\end{document}