init

diagrams/ake.tex

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+\begin{figure}[h!]
+  \centering
+  %\footnotesize % Apply footnotesize to all text
+  \setmsckeyword{}
+  \drawframe{no}    % uncomment to not draw a frame
+  \begin{msc}[
+    /msc/title top distance=0cm,
+    /msc/first level height=.1cm,
+    /msc/last level height=0.7cm,  % Slightly reduced
+    /msc/head height=0cm,
+    /msc/instance width=0cm,
+    /msc/head top distance=0.5cm,
+    /msc/foot distance=-0.0cm,
+    /msc/instance width=0cm,
+    /msc/condition height=0.1cm  % Reduced condition height
+    ]{}
+    %%%%%%%%%%%%%%%%%% CONFIG %%%%%%%%%%%%%%%%%%%%%%%%%
+    \setlength{\instwidth}{0\mscunit} % to remove default box below agents 
+    \setlength{\instdist}{4.5cm}  % default value between agents
+
+    %%%%%%%%%%%%%%%%%% AGENTS %%%%%%%%%%%%%%%%%%%%%%%%%
+    \declinst{A}{              % Alice
+      \begin{tabular}[c]{c}
+        Alice \\
+      \end{tabular}
+    }{}
+    \declinst{B}{              % Bob
+      \begin{tabular}[c]{c}
+        Bob  
+      \end{tabular}
+    }{}
+
+    \nextlevel[0.25]
+
+
+\action*{
+  \footnotesize
+  \begin{tabular}{@{}l@{}}
+    \textsf{(pk\textsubscript{A}, sk\textsubscript{A}) = DH\_Gen()} \\
+    \textsf{(spk\textsubscript{A}, ssk\textsubscript{A}) = SignGen()} \\
+    \textsf{sig\_pk\textsubscript{A} = Sign(spk\textsubscript{A}, pk\textsubscript{A})}
+  \end{tabular}
+}{A}
+
+\action*{
+  \footnotesize
+  \begin{tabular}{@{}l@{}}
+    \textsf{(pk\textsubscript{B}, sk\textsubscript{B}) = DH\_Gen()} \\
+    \textsf{(spk\textsubscript{B}, ssk\textsubscript{B}) = SignGen()} \\
+    \textsf{sig\_pk\textsubscript{B} = Sign(spk\textsubscript{B}, pk\textsubscript{B})}
+  \end{tabular}
+}{B}
+
+    \nextlevel[3]
+
+  \condition{{{\footnotesize out-of-band verification of \textsf{spk\textsubscript{A}, spk\textsubscript{B}}}}}{B,A}
+
+    \nextlevel[2.5]
+    \mess{\footnotesize\textsf{spk\textsubscript{A}, sig\_pk\textsubscript{A}, pk\textsubscript{A}}}{A}{B}
+    \nextlevel[1.25]
+    \mess{\footnotesize\textsf{spk\textsubscript{B}, sig\_pk\textsubscript{B}, pk\textsubscript{B}}}{B}{A}
+
+  \nextlevel[0.75]
+
+\action*{
+  \footnotesize
+  \begin{tabular}{@{}l@{}}
+    \textsf{if CheckSign(spk\textsubscript{B}, pk\textsubscript{B}, sig\_pk\textsubscript{B})} \\
+    \textsf{key = DH(sk\textsubscript{A}, pk\textsubscript{B})}
+  \end{tabular}
+}{A}
+
+\action*{
+  \footnotesize
+  \begin{tabular}{@{}l@{}}
+    \textsf{if CheckSign(spk\textsubscript{A}, pk\textsubscript{A}, sig\_pk\textsubscript{A})} \\
+    \textsf{key = DH(sk\textsubscript{B}, pk\textsubscript{A})}
+  \end{tabular}
+}{B}
+
+  \nextlevel[1]
+
+   \end{msc}
+\end{figure}
+