[Tex/LaTex] How to draw the following attacker picture in protocol using TiKZ

tikz-pgf

The attacker in protocol, how to draw the attacker picture using TiKZ in latex ? Alice Bob and Eva ?

Best Answer

I don't know too much about security protocols but tikzpeople package has been designed by its author Nils Fleischhacker with this intention:

The package was originally written to provide me with shapes of people to depict parties in cryptographic protocols and security definitions on beamer slides.

There's no devil figure, but there exist evil option which can provide funny results:

\documentclass[tikz,border=2mm]{standalone} 
\usetikzlibrary{positioning}
\usepackage{tikzpeople}

\begin{document}
\begin{tikzpicture}[every node/.style={minimum width=1.5cm}]
\node[alice] (alice) {};
\node[bob, right= 4cm of alice, mirrored] (bob) {};
\draw[->, thick] (alice) -- coordinate[near start] (aux) (bob);
\node[priest, evil, mirrored, above right=-5mm and 1cm of alice] (priest) {};
\draw[->,red, ultra thick] (priest)--(aux);
\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] How to draw the following picture in LaTeX

TikZ doesn't name your nodes by their contents so you can't refer to the nodes as 1,2,3,4,5,n,n+1. Rather you have to refer to them by their position, so you want the 2nd, 3rd, 4th (etc) nodes across. You also only need to iterate over the columns since you're doing one thing to each column and not doing anything on a per-row basis.

\documentclass{article}
%\url{http://tex.stackexchange.com/q/303682/86}
\usepackage{tikz}
\usetikzlibrary{matrix}

\begin{document}

\begin{tikzpicture}
  \matrix[matrix of math nodes,row sep=1cm,column sep=.5cm] (m)
  {
    N: & 1      & 2      & 3      & 4  &\ldots          &n-1   &n     \\
    N':& 2       & 3      & 4      & 5  &\ldots          &n     & n+1 \\
  };
  \foreach \x in {2,3,4,5,7,8} {
    \draw[<->] (m-1-\x) -- (m-2-\x);
  }
\end{tikzpicture}
\end{document}

As all your nodes are actually maths, you can use matrix of math nodes. I also spaced out the columns a little.

(I lied a little. You can get TikZ to name the nodes whatever you like. However, in this case I think that using the positions is as simple a naming scheme as any.)

TikZ Graphics – How to Draw Complex Pictures Using TikZ in LaTeX

Here is a tikz-cd solution

\documentclass{article}

\usepackage{tikz-cd}
\newcommand{\e}{\varepsilon}

\begin{document}

\begin{tikzcd}[column sep=1.5cm, cells={nodes={draw, circle, inner sep=.5mm}}]
|[draw=none]|\arrow[r] & q_0\arrow[r,"{a,\e\to a}"] & q_1\arrow[r,"{\e,\e\to\e}"]\arrow[<-,loop above,"{a,\e\to a}"] 
    & q_2\arrow[r,"{\e,\e\to\e}"]\arrow[<-,loop above,"{b,\e\to\e}"] & q_3\arrow[r,"{c,a\to\e}"] 
    & q_4\arrow[r,"{c,\e\to\e}"] & |[double]|q_5\arrow[ll, bend right,"{\e,\e\to\e}"']
\end{tikzcd}

\end{document}

Best Answer

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[Tex/LaTex] How to draw the following picture in LaTeX

TikZ Graphics – How to Draw Complex Pictures Using TikZ in LaTeX

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