%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentstyle[12pt,twoside,alltt]{article}
% \documentstyle[12pt,twoside,alltt,psfig]{article}
% is the line you should use IF you're using EPS images.
% make sure to copy the psfig.sty file into the directory with
% the latex document however.
\textwidth=6in
\oddsidemargin=0.25in
\evensidemargin=0.25in
\topmargin=-0.1in
\footskip=0.8in
\parindent=0.0cm
\parskip=0.3cm
\textheight=8.00in
\setcounter{tocdepth} {3}
\setcounter{secnumdepth} {2}
\sloppy

\newenvironment{proof}{\noindent{\bf Proof:}}{\qed\bigskip}
\newenvironment{proof_sketch}{\noindent{\bf Sketch of 
Proof}\hspace*{1em}}{\qed\bigskip}

\newtheorem{theorem}{Theorem}
\newtheorem{corollary}{Corollary}
\newtheorem{lemma}{Lemma}
\newtheorem{claim}{Claim}
\newtheorem{fact}{Fact}
\newtheorem{definition}{Definition}
\newtheorem{assumption}{Assumption}
\newtheorem{observation}{Observation}
\newtheorem{example}{Example}
\newcommand{\qed}{\rule{7pt}{7pt}}

\newcommand{\lecture}[4]{
\pagestyle{headings}
\thispagestyle{plain}
\newpage
\noindent
\begin{center}
\framebox{
\vbox{
\hbox to 5.75in { {\bf 6.857 Computer and Network Security
\hfill Fall Term, 1997}  }
\vspace{4mm}
\hbox to 5.75in { {\Large \hfill Lecture #1 : #2 \hfill} }
\vspace{2mm}
\hbox to 5.75in { {\it Lecturer: #3 \hfill Scribe: #4} }
}
}
\end{center}
\markboth{Lecture #1 : #2}{Lecture #1 : #2}
\vspace*{4mm}
}

\begin{document}

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% Lecture command takes 4 arguments:
%		ordinal number of the lecure
%		date of the lecure
%		lecturer
%		scribe---that is you
%
\lecture{nn}{date}{Ron Rivest}{Your Name} 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% For theorems, lemmas, definitions, remarks, etc. use commands
% \begin{theorem} .... \end{theorem} 
% \begin{definition} ... \end{definition} 
% \begin{proof} ... \end{proof}
% and so on ...
%
% If you want to insert figures in your notes do the following: 
% 1) Prepare your figures using your favourite graphic editor
% 	for example idraw or xfig
% 2) Save your pictures in PostScript form using the following convention
% 	notes-nn-fig-mm.eps where nn is the number of the lecture you 
% 	are scribing and mm is the sequential number of the picture in the 
% 	notes
% 3) Insert the following block in your LaTeX code in the place you 
% 	want to insert the figure. HOWEVER, leave it commented or follow
%	  the instructions at the top if you want to latex it on Athena. 
%
% \begin{figure}[h]
% \begin{center}
% \mbox{\psfig{figure=notes-nn-fig-mm.eps}}
% \caption{A very nice picture.}
% \label{fig:mm}
% \end{center}
% \end{figure}
%
% 	of course the picture will not show up when you compile and 
% 	print your notes, but don't worry the TA will take care of it. 
% 4) When you mail the TA the LaTeX code mail him/her the PostScript
%	files for the figures as well 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Your notes start here!
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%







%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Your notes end here!
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\end{document}
