diff --git a/Assignment 4 - Protokollsicherheit (Praxis)/abgabe.tex b/Assignment 4 - Protokollsicherheit (Praxis)/abgabe.tex
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+\documentclass[11pt]{scrartcl}
+
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage[ngerman]{babel}
+\usepackage{lmodern}
+\usepackage{graphicx}
+\usepackage{listings}
+\usepackage{xspace}
+\usepackage{amsmath}
+\usepackage{algorithm}
+\usepackage{algpseudocode}
+\usepackage{xifthen}
+\usepackage[a4paper,lmargin={2cm},rmargin={2cm},tmargin={2.5cm},bmargin = {2.5cm},headheight = {4cm}]{geometry}
+\usepackage{amsmath,amssymb,amstext,amsthm}
+\usepackage[shortlabels]{enumitem}
+\usepackage[headsepline]{scrlayer-scrpage} 
+\pagestyle{scrheadings} 
+\usepackage{titling}
+\usepackage{etoolbox}
+\usepackage{tikz}
+
+\usetikzlibrary{shapes, arrows, calc, automata, arrows.meta, positioning,decorations.pathmorphing,backgrounds,decorations.markings,decorations.pathreplacing, graphs}
+\usetikzlibrary{matrix,shapes,arrows,positioning,chains, calc}
+
+\tikzset{% 
+    initial text={},
+    state/.style={circle, draw, minimum size=.6cm},
+    every initial by arrow/.style={-stealth},
+    every loop/.append style={-stealth},
+    >=stealth
+}
+
+\ohead{\parbox[t]{.5\linewidth}{\raggedleft \theauthor}}
+\ihead{System Security, SoSe 24, Assignment \thesheetnr}
+
+% Sheet number
+\newcounter{sheetnr}
+\newcommand{\sheetnr}[1]{\setcounter{sheetnr}{#1}}
+
+% Exercise environments
+\newenvironment{exercise}[2][]{\section*{#2\expandafter\ifstrempty\expandafter{#1}{}{\ #1}}}{}
+\newenvironment{subexercises}{\begin{enumerate}[a), font=\bfseries, wide, labelindent=0pt]}{\end{enumerate}}
+\newenvironment{subsubexercises}{\begin{enumerate}[i), font=\bfseries, wide, labelindent=0pt]}{\end{enumerate}}
+
+% Makros
+
+% Anpassen --> %
+\author{Benjamin Haschka\\Sascha Tommasone\\Paul Zinselmeyer}
+\sheetnr{4}
+% <-- Anpassen %
+
+\begin{document}
+\begin{exercise}[Warm Up]{2.1.}
+
+\end{exercise}
+
+\newpage
+\begin{exercise}[Key Establishment]{2.2.}
+
+\end{exercise}
+
+\newpage
+\begin{exercise}[Authentication without Trusted Party]{2.3.}
+
+\end{exercise}
+
+\newpage
+\begin{exercise}[Authentication with Trusted Party]{2.4.}
+
+\end{exercise}
+\end{document}
\ No newline at end of file