\documentclass[10pt]{amsart}
\usepackage{latexsym}
\usepackage{amssymb,amsmath}
\usepackage{pifont,tikz,multicol}
\usepackage{geometry}
\usepackage{setspace}
\usetikzlibrary{arrows}
%\usepackage[dvips]{graphicx}
%\usepackage[dvips]{graphics}

\topmargin = 0.1in \textwidth=5.7in \textheight=8.6in

%\oddsidemargin = 0.2in \evensidemargin = 0.2in

\title{Mathematics 4440/5440\\ 
Cryptosystem Organizer}

\begin{document}
\vspace*{-3.0cm}
\maketitle

{\bf Cryptosystem:}
\vspace{1em}

Plaintext space:
\vspace{1em}

Ciphertext space:
\vspace{1em}

Key space (and its size):
\vspace{1em}

Encryption:
\vspace{5em}

Decryption:
\vspace{5em}

Example:
\vspace{8em}

Ciphertext only attacks:
\vspace{7em}

Known plaintext attacks:
\vspace{7em}

Chosen plaintext attacks:
\vspace{7em}

Chosen ciphertext attacks:


\end{document}
