diff --git a/protocol_prototype/IcingProtocol.drawio b/protocol_prototype/IcingProtocol.drawio
new file mode 100644
index 0000000..06c3cb0
--- /dev/null
+++ b/protocol_prototype/IcingProtocol.drawio
@@ -0,0 +1,262 @@
+<mxfile host="app.diagrams.net" agent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" version="26.0.16">
+  <diagram id="C5RBs43oDa-KdzZeNtuy" name="Page-1">
+    <mxGraphModel dx="264" dy="467" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+      <root>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-0" />
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-1" parent="WIyWlLk6GJQsqaUBKTNV-0" />
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-2" value="" style="rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;edgeStyle=orthogonalEdgeStyle;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-3" target="WIyWlLk6GJQsqaUBKTNV-6" edge="1">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-3" value="Alice appelle Bob" style="rounded=1;whiteSpace=wrap;html=1;fontSize=12;glass=0;strokeWidth=3;shadow=0;strokeColor=light-dark(#000000,#370FFF);" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="300" y="90" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-4" value="Yes" style="rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;edgeStyle=orthogonalEdgeStyle;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-0" target="WIyWlLk6GJQsqaUBKTNV-10" edge="1">
+          <mxGeometry y="20" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-5" value="No" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-6" target="WIyWlLk6GJQsqaUBKTNV-7" edge="1">
+          <mxGeometry y="10" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-6" value="Bob répond ?" style="rhombus;whiteSpace=wrap;html=1;shadow=0;fontFamily=Helvetica;fontSize=12;align=center;strokeWidth=1;spacing=6;spacingTop=-4;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="310" y="180" width="100" height="80" as="geometry" />
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-7" value="Rien ne se passe" style="rounded=1;whiteSpace=wrap;html=1;fontSize=12;glass=0;strokeWidth=1;shadow=0;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="460" y="200" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-8" value="Négativement" style="rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;edgeStyle=orthogonalEdgeStyle;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-10" target="WIyWlLk6GJQsqaUBKTNV-11" edge="1">
+          <mxGeometry y="40" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-9" value="Positivement" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-10" target="WIyWlLk6GJQsqaUBKTNV-12" edge="1">
+          <mxGeometry y="10" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-10" value="Bob ping..." style="whiteSpace=wrap;html=1;shadow=0;fontFamily=Helvetica;fontSize=12;align=center;strokeWidth=1;spacing=6;spacingTop=-4;shape=hexagon;perimeter=hexagonPerimeter2;fixedSize=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="310" y="390" width="100" height="80" as="geometry" />
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-11" value="Protocole échoué&lt;div&gt;-&lt;/div&gt;&lt;div&gt;Passage en clair&lt;/div&gt;" style="rounded=1;whiteSpace=wrap;html=1;fontSize=12;glass=0;strokeWidth=3;shadow=0;strokeColor=light-dark(#000000,#FF1414);" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="300" y="520" width="120" height="50" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-7" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-12" target="FXGPDhTRSO2FZSW48CnP-8">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="599.9999999999998" y="500" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-12" value="Alice envoi le début de handshake a Bob" style="rounded=1;whiteSpace=wrap;html=1;fontSize=12;glass=0;strokeWidth=1;shadow=0;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="540" y="410" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-1" value="" style="rounded=0;html=1;jettySize=auto;orthogonalLoop=1;fontSize=11;endArrow=block;endFill=0;endSize=8;strokeWidth=1;shadow=0;labelBackgroundColor=none;edgeStyle=orthogonalEdgeStyle;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-6" target="FXGPDhTRSO2FZSW48CnP-0">
+          <mxGeometry y="20" relative="1" as="geometry">
+            <mxPoint as="offset" />
+            <mxPoint x="360" y="260" as="sourcePoint" />
+            <mxPoint x="360" y="390" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-0" value="Le dialer d&#39;Alice envoi un PING a Bob" style="rounded=1;whiteSpace=wrap;html=1;fontSize=12;glass=0;strokeWidth=1;shadow=0;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="300" y="300" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-2" value="" style="endArrow=block;html=1;rounded=0;exitX=0;exitY=0.5;exitDx=0;exitDy=0;endFill=0;entryX=1;entryY=0.5;entryDx=0;entryDy=0;edgeStyle=orthogonalEdgeStyle;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="WIyWlLk6GJQsqaUBKTNV-10" target="FXGPDhTRSO2FZSW48CnP-4">
+          <mxGeometry width="50" height="50" relative="1" as="geometry">
+            <mxPoint x="480" y="450" as="sourcePoint" />
+            <mxPoint x="190" y="430" as="targetPoint" />
+            <Array as="points">
+              <mxPoint x="280" y="430" />
+              <mxPoint x="280" y="460" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-3" value="Ne ping pas" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-2">
+          <mxGeometry x="-0.2695" relative="1" as="geometry">
+            <mxPoint x="-16" y="-10" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-5" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-4" target="FXGPDhTRSO2FZSW48CnP-0">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="130" y="320" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-6" value="Reping" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-5">
+          <mxGeometry x="0.0817" relative="1" as="geometry">
+            <mxPoint x="23" y="-10" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-4" value="Attendre 1s ? 0.5s ?" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="70" y="440" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-12" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=1;entryY=0.5;entryDx=0;entryDy=0;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-8" target="FXGPDhTRSO2FZSW48CnP-11">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="530.0380952380951" y="585.0038095238094" as="sourcePoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-13" value="Non" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-12">
+          <mxGeometry x="-0.4964" y="-1" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-43" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;endArrow=block;endFill=0;strokeColor=light-dark(#000000,#FF0000);" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-8" target="FXGPDhTRSO2FZSW48CnP-27">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="600" y="800" as="targetPoint" />
+            <Array as="points">
+              <mxPoint x="600" y="660" />
+              <mxPoint x="570" y="660" />
+              <mxPoint x="570" y="700" />
+              <mxPoint x="210" y="700" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-44" value="Oui" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-43">
+          <mxGeometry x="-0.8049" y="1" relative="1" as="geometry">
+            <mxPoint x="8" y="-25" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-8" value="Bob reconnait la clé publique d&#39;Alice ?" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="540" y="545" width="120" height="75" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-16" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=0;entryX=0.5;entryY=1;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-11" target="WIyWlLk6GJQsqaUBKTNV-11">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="360" y="600" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-17" value="Non" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-16">
+          <mxGeometry x="-0.1233" y="-2" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-20" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-11" target="FXGPDhTRSO2FZSW48CnP-19">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-21" value="Oui" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-20">
+          <mxGeometry x="-0.275" y="1" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-11" value="Bob accepte la clé d&#39;Alice?" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="354" y="620" width="120" height="75" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-23" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-19" target="FXGPDhTRSO2FZSW48CnP-22">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-19" value="Bob envoi sa clé publique en demandant un accord commun" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="160" y="636.25" width="120" height="42.5" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-24" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0;entryY=0.5;entryDx=0;entryDy=0;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-22" target="WIyWlLk6GJQsqaUBKTNV-11">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="70" y="545" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-25" value="Non" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-24">
+          <mxGeometry x="-0.7543" y="3" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-28" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-22" target="FXGPDhTRSO2FZSW48CnP-27">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="70" y="750" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-22" value="Alice accepte l&#39;accord commun ?" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;rounded=0;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="30" y="617.5" width="80" height="80" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-47" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-26" target="FXGPDhTRSO2FZSW48CnP-46">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-26" value="Alice et Bob sont d&#39;accord sur la clé symmétrique a utiliser" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="340" y="820" width="120" height="60" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-31" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-27" target="FXGPDhTRSO2FZSW48CnP-30">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-45" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0;entryY=0.5;entryDx=0;entryDy=0;strokeColor=light-dark(#000000,#FF1616);endArrow=block;endFill=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-27" target="FXGPDhTRSO2FZSW48CnP-26">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="210" y="850" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-27" value="Alice et Bob calculent le secret partagé de leur côté" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="150" y="720" width="120" height="50" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-33" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0.5;entryY=1;entryDx=0;entryDy=0;jumpStyle=sharp;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-29" target="FXGPDhTRSO2FZSW48CnP-34">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="640" y="680" as="targetPoint" />
+            <Array as="points">
+              <mxPoint x="700" y="745" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-36" value="Non" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-33">
+          <mxGeometry x="-0.1536" y="1" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-41" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-29" target="FXGPDhTRSO2FZSW48CnP-26">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="525" y="798" />
+              <mxPoint x="510" y="798" />
+              <mxPoint x="510" y="850" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-42" value="Oui" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-41">
+          <mxGeometry x="-0.7774" y="1" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-29" value="Ils sont d&#39;accord ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="460" y="715" width="130" height="60" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-32" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-30" target="FXGPDhTRSO2FZSW48CnP-29">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-30" value="Alice et Bob lisent à haute voix la phrase de sécurité" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="300" y="720" width="120" height="50" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-37" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-34" target="WIyWlLk6GJQsqaUBKTNV-12">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-38" value="Oui" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-37">
+          <mxGeometry x="-0.3086" y="-2" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-39" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=1;entryY=0.5;entryDx=0;entryDy=0;jumpStyle=sharp;jumpSize=8;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-34" target="WIyWlLk6GJQsqaUBKTNV-11">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="530" y="690" />
+              <mxPoint x="530" y="545" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-40" value="Non" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="FXGPDhTRSO2FZSW48CnP-39">
+          <mxGeometry x="-0.7617" relative="1" as="geometry">
+            <mxPoint as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-34" value="Ré-essayer ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="660" y="650" width="80" height="80" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-49" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="WIyWlLk6GJQsqaUBKTNV-1" source="FXGPDhTRSO2FZSW48CnP-46" target="FXGPDhTRSO2FZSW48CnP-48">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-46" value="Alice et Bob utilisent la clé symmétrique pour chiffrer leurs transmissions" style="whiteSpace=wrap;html=1;rounded=0;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="340" y="920" width="120" height="60" as="geometry" />
+        </mxCell>
+        <mxCell id="FXGPDhTRSO2FZSW48CnP-48" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="WIyWlLk6GJQsqaUBKTNV-1">
+          <mxGeometry x="360" y="1020" width="80" height="80" as="geometry" />
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>