\documentclass[12pt]{article}

\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{a4wide}


\begin{document}

\begin{minipage}{.3\textwidth}%
%\hspace{-0.8cm}\includegraphics[scale=.8]{ethlogo}
\end{minipage} \hfill
\raisebox{1.5mm}{%
\begin{minipage}{0.69\textwidth}\sf\flushright%
\textbf{\Large  Security models}\mbox{\hspace{5mm}}\\ {1st Semester
2007/2008}\mbox{\hspace{5mm}}%
\end{minipage}%
}\\\hrule \ \\
\begin{minipage}[t]{0.5\textwidth}\sf\textit{P.Lafourcade}
\end{minipage} \hfill%
\begin{minipage}[t]{0.5\textwidth}\sf\flushright \textit{
       YOUR NAME \\ YOUR NAME
}\end{minipage}%

  \vspace{-0.5em}

  \begin{center}
	\textbf{\Large Lecture Note XX } \\[0.5ex]
	% Deadline, is one week after the lecture.
        % Please change XX and put the corect date
	\textrm{\sf Date: \normalsize dd.mm.yyyy} \\
\end{center}
\vspace{0.5em}

\section{section first}
\subsection{subsection first}
\subsubsection{subsubsection  first}
\paragraph{paragrah first}

  \begin{itemize}
  \item  Try 
  \item  it
  \end{itemize}
\paragraph{paragrah second}

\subsubsection{subsubsection second}

\subsection{subsection second}

\section{section second}



\end{document}