\begin{tikzpicture}[node distance=0.5cm,auto,>=stealth]
	\tikzstyle{shadowed}=[general shadow={fill=nodeshadow,shadow xshift=\shadowshift,shadow yshift=\shadowshift}]
	\tikzstyle{knode}=[circle,draw=black,thick,inner sep=5pt,baseline=(current bounding box.center),fill=white,shadowed]
	\tikzstyle{astyle}=[{Latex[black,length=2.5mm,width=1.5mm]}-,semithick]
	\begin{scope}[baseline=(current bounding box.center)]
		\node[knode,minimum size=2.5cm] (n-1) at (0:6cm) {recipient};
		\node[knode] (n0) at (0:3cm) {node 3};
		\node[knode] (n1) at (60:3cm) {node 2};
		\node[knode] (n2) at (120:3cm) {node 1};
		\node[knode] (n3) at (180:3cm) {node 0};
		\node[knode,minimum size=2.5cm] (n4) at (180:6cm) {sender};
		%arrows
		\draw[astyle] (n-1)--(n0);
		\draw[astyle] (n0)--(n1);
		\draw[astyle] (n1)--(n2);
		\draw[astyle] (n2)--(n3);
		\draw[astyle] (n3)--(n4);
	\end{scope}

	% Legende
	\node[knode] (n) at (6,4) {node n}                                                                node[right=-1cm of n,scale=2, xshift=20, align=left] {\tiny $\text{Node}$};
	\node[below= of n] (nl) {}; \draw[astyle,pos=0.5]  ($(nl)-(0.5,0)$) -- +(1,0) node[right=-1cm of nl,scale=2, xshift=30, align=left] (nl) {\tiny $\text{Message}$};
	\draw ($(n.north west)+(-1,0.6)$) rectangle (nl.south east);
\end{tikzpicture}
