<mxfile host="app.diagrams.net" agent="architecture-deliverables" version="24.0.0">
  <diagram name="Security Trust Zones" id="20-security-trust-zones">
    <mxGraphModel dx="1400" dy="900" background="#ffffff" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="1700" pageHeight="640" math="0" shadow="0">
      <root>
        <mxCell id="0" />
        <mxCell id="1" parent="0" />
        <mxCell id="_box1" value="Untrusted — Internet" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="90" width="300" height="380" as="geometry" />
        </mxCell>
        <mxCell id="n.atk" value="&lt;b&gt;Attacker&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Scraping, enumeration&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontColor=#5c1a17;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="70" y="120" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.usr" value="&lt;b&gt;Legitimate Client&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#1a2b45;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="70" y="210" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.unv" value="&lt;b&gt;Unverified Client&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Modified or emulated&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontColor=#5c1a17;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="70" y="290" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.sim" value="&lt;b&gt;SIM Swap Attempt&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontColor=#5c1a17;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="70" y="380" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box2" value="Perimeter" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="370" y="90" width="300" height="380" as="geometry" />
        </mxCell>
        <mxCell id="n.ddos" value="&lt;b&gt;Anycast &amp; DDoS Scrubbing&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="400" y="120" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.tls" value="&lt;b&gt;TLS 1.3 Termination&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="400" y="210" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.noise" value="&lt;b&gt;Noise Handshake&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Device key pinning&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="400" y="290" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.guard" value="&lt;b&gt;Rate &amp; Abuse Guard&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Per number, IP, device&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="400" y="380" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box3" value="Application zone" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="700" y="90" width="300" height="380" as="geometry" />
        </mxCell>
        <mxCell id="n.gw" value="&lt;b&gt;Connection Gateway&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#1a2b45;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="720" y="120" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.authz" value="&lt;b&gt;Authorization&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Device-scoped claims&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="720" y="210" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.svc" value="&lt;b&gt;Core Services&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;mTLS service mesh&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#1a2b45;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="720" y="290" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box4" value="Data zone" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="1030" y="90" width="300" height="380" as="geometry" />
        </mxCell>
        <mxCell id="n.ms" value="&lt;b&gt;Message Store&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Ciphertext only&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1050" y="120" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.adb" value="&lt;b&gt;Account &amp; Group DB&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Encrypted at rest&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1050" y="210" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.blob" value="&lt;b&gt;Media Blobs&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Opaque bytes&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1050" y="290" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box5" value="Key &amp; audit zone" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="1360" y="90" width="300" height="380" as="geometry" />
        </mxCell>
        <mxCell id="n.kms" value="&lt;b&gt;HSM-backed KMS&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1380" y="120" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.vault" value="&lt;b&gt;Backup Key Vault&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;10 attempts, then lock&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1380" y="210" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.audit" value="&lt;b&gt;Audit Log&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Append only, WORM&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1380" y="290" width="250" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_e6" value="traffic dropped" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;endArrow=block;endFill=1;strokeColor=#b85450;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.atk" target="n.ddos">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e7" value="lockout, 7 days" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;endArrow=block;endFill=1;strokeColor=#b85450;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.sim" target="n.guard">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e8" value="session refused" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;endArrow=block;endFill=1;strokeColor=#b85450;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.unv" target="n.noise">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e9" value="TLS 1.3, pinned" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.usr" target="n.tls">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e10" value="authenticated session" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.noise" target="n.gw">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="690" y="330" />
              <mxPoint x="690" y="160" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="_e11" value="device claim check" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.gw" target="n.authz">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e12" value="scoped token, 15 min" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.authz" target="n.svc">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e13" value="ciphertext write" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.svc" target="n.ms">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="1010" y="330" />
              <mxPoint x="1010" y="160" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="_e14" value="envelope keys" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=0;exitDx=0;exitDy=0;entryX=0.5;entryY=1;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.svc" target="n.kms">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="850" y="290" />
              <mxPoint x="1030" y="290" />
              <mxPoint x="1030" y="200" />
              <mxPoint x="1510" y="200" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="_e15" value="access logged" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;endArrow=open;endFill=0;strokeColor=#d79b00;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.vault" target="n.audit">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="title" value="Security Trust Zones" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=20;fontStyle=1;fontColor=#16202c;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="20" width="1610" height="30" as="geometry" />
        </mxCell>
        <mxCell id="rule" value="" style="line;strokeWidth=1;html=1;strokeColor=#c9d3de;" vertex="1" parent="1">
          <mxGeometry x="40" y="50" width="1610" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg16" value="" style="rounded=1;arcSize=30;html=1;fillColor=#f8cecc;strokeColor=#b85450;" vertex="1" parent="1">
          <mxGeometry x="40" y="540" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg17" value="Risk / gap" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="70" y="540" width="70" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg18" value="" style="rounded=1;arcSize=30;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;" vertex="1" parent="1">
          <mxGeometry x="160" y="540" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg19" value="Application we own" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="190" y="540" width="110" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg20" value="" style="rounded=1;arcSize=30;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;" vertex="1" parent="1">
          <mxGeometry x="320" y="540" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg21" value="Security / platform" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="350" y="540" width="110" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg22" value="" style="rounded=1;arcSize=30;html=1;fillColor=#d5e8d4;strokeColor=#82b366;" vertex="1" parent="1">
          <mxGeometry x="480" y="540" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg23" value="Data store" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="510" y="540" width="70" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg24" value="" style="html=1;endArrow=none;dashed=1;strokeColor=#b85450;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="600" y="550" as="sourcePoint" />
            <mxPoint x="620" y="550" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg25" value="failure / alternate" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="630" y="540" width="110" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg26" value="" style="html=1;endArrow=none;strokeColor=#5a6570;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="760" y="550" as="sourcePoint" />
            <mxPoint x="790" y="550" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg27" value="synchronous" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="790" y="540" width="70" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg28" value="" style="html=1;endArrow=none;dashed=1;strokeColor=#d79b00;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="880" y="550" as="sourcePoint" />
            <mxPoint x="910" y="550" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg29" value="event / async" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="910" y="540" width="80" height="20" as="geometry" />
        </mxCell>
        <mxCell id="note" value="A perimeter breach yields ciphertext and metadata. Message content requires a device private key." style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#8a97a5;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="570" width="1610" height="20" as="geometry" />
        </mxCell>
        <mxCell id="foot-rule" value="" style="line;strokeWidth=1;html=1;strokeColor=#e3e9ef;" vertex="1" parent="1">
          <mxGeometry x="40" y="590" width="1610" height="10" as="geometry" />
        </mxCell>
        <mxCell id="foot" value="v 1.0   ·   owner Platform Architecture   ·   date 2026-08" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=9;fontColor=#9aa7b4;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="600" width="1610" height="10" as="geometry" />
        </mxCell>
      </root>
    </mxGraphModel>
  </diagram>
</mxfile>
