diff --git a/2_Preparation/Figs/security-zones-attackers.svg b/2_Preparation/Figs/security-zones-attackers.svg
index 2ed114b..8124979 100644
--- a/2_Preparation/Figs/security-zones-attackers.svg
+++ b/2_Preparation/Figs/security-zones-attackers.svg
@@ -13,9 +13,85 @@
    version="1.1"
    id="svg8"
    inkscape:version="1.0.2 (e86c870879, 2021-01-15)"
-   sodipodi:docname="security-zones.svg">
+   sodipodi:docname="security-zones-attackers.svg"
+   inkscape:export-filename="/home/jake/repos/dissertation/dissertation-4-dissertation/2_Preparation/Figs/security-zones-attackers.png"
+   inkscape:export-xdpi="192"
+   inkscape:export-ydpi="192">
   <defs
      id="defs2">
+    <marker
+       style="overflow:visible;"
+       id="marker3955"
+       refX="0.0"
+       refY="0.0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:isstock="true">
+      <path
+         transform="scale(0.4) rotate(180) translate(10,0)"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         id="path3953" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="marker3837"
+       refX="0.0"
+       refY="0.0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mstart"
+       inkscape:isstock="true">
+      <path
+         transform="scale(0.4) translate(10,0)"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         id="path3835" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="marker3737"
+       refX="0.0"
+       refY="0.0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mstart"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         transform="scale(0.4) translate(10,0)"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         id="path3735" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="marker3643"
+       refX="0.0"
+       refY="0.0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mstart"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         transform="scale(0.4) translate(10,0)"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         id="path3641" />
+    </marker>
+    <marker
+       style="overflow:visible;"
+       id="marker3567"
+       refX="0.0"
+       refY="0.0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         transform="scale(0.4) rotate(180) translate(10,0)"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         id="path3565" />
+    </marker>
     <marker
        style="overflow:visible;"
        id="marker1583"
@@ -23,7 +99,8 @@
        refY="0.0"
        orient="auto"
        inkscape:stockid="Arrow1Mend"
-       inkscape:isstock="true">
+       inkscape:isstock="true"
+       inkscape:collect="always">
       <path
          transform="scale(0.4) rotate(180) translate(10,0)"
          style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
@@ -37,7 +114,8 @@
        refY="0.0"
        orient="auto"
        inkscape:stockid="Arrow1Mstart"
-       inkscape:isstock="true">
+       inkscape:isstock="true"
+       inkscape:collect="always">
       <path
          transform="scale(0.4) translate(10,0)"
          style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1;fill:#000000;fill-opacity:1"
@@ -140,9 +218,9 @@
      borderopacity="1.0"
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
-     inkscape:zoom="4"
-     inkscape:cx="148.78418"
-     inkscape:cy="52.052802"
+     inkscape:zoom="2.8284271"
+     inkscape:cx="199.57677"
+     inkscape:cy="44.550937"
      inkscape:document-units="mm"
      inkscape:current-layer="layer1"
      inkscape:document-rotation="0"
@@ -164,7 +242,7 @@
         <dc:format>image/svg+xml</dc:format>
         <dc:type
            rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
+        <dc:title />
       </cc:Work>
     </rdf:RDF>
   </metadata>
@@ -173,22 +251,10 @@
      inkscape:groupmode="layer"
      id="layer1">
     <rect
-       style="fill:#000000;fill-opacity:0.14521094;stroke:none;stroke-width:0.264999;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
-       id="rect1691"
-       width="55.5625"
-       height="26.458332"
-       x="34.395832"
-       y="1.3229166" />
-    <path
-       style="fill:none;stroke:#000000;stroke-width:0.265;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:0.53, 0.53;stroke-dashoffset:0;stroke-opacity:1"
-       d="M 34.380862,1.3152943 34.116293,27.773628"
-       id="path925"
-       sodipodi:nodetypes="cc" />
-    <rect
-       style="fill:none;fill-opacity:0.241541;stroke:#000000;stroke-width:0.130673;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       style="fill:none;fill-opacity:0.241541;stroke:#000000;stroke-width:0.172532;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
        id="rect835"
-       width="88.635422"
-       height="26.458334"
+       width="96.572922"
+       height="42.333332"
        x="1.3229166"
        y="1.3229166" />
     <rect
@@ -197,17 +263,17 @@
        width="15.875"
        height="10.583334"
        x="3.96875"
-       y="10.583333" />
+       y="17.197916" />
     <text
        xml:space="preserve"
        style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
        x="7.851006"
-       y="16.093414"
+       y="22.707998"
        id="text841"><tspan
          sodipodi:role="line"
          id="tspan839"
          x="7.851006"
-         y="16.093414"
+         y="22.707998"
          style="stroke-width:0.264583">Client</tspan></text>
     <rect
        style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.213809;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
@@ -215,21 +281,21 @@
        width="15.875"
        height="10.583334"
        x="26.458334"
-       y="10.583334" />
+       y="17.197916" />
     <text
        xml:space="preserve"
        style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
        x="30.662308"
-       y="14.632818"
+       y="21.247402"
        id="text841-6"><tspan
          sodipodi:role="line"
          id="tspan839-7"
          x="30.662308"
-         y="14.632818"
+         y="21.247402"
          style="stroke-width:0.264583">Local</tspan><tspan
          sodipodi:role="line"
          x="30.662308"
-         y="18.160606"
+         y="24.77519"
          style="stroke-width:0.264583"
          id="tspan871">Portal</tspan></text>
     <rect
@@ -237,17 +303,17 @@
        id="rect837-3-2"
        width="15.875"
        height="10.583334"
-       x="71.4375"
-       y="10.583334" />
+       x="79.375"
+       y="17.197916" />
     <text
        xml:space="preserve"
        style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="75.112305"
-       y="16.220318"
+       x="83.049805"
+       y="22.8349"
        id="text841-6-9"><tspan
          sodipodi:role="line"
-         x="75.112305"
-         y="16.220318"
+         x="83.049805"
+         y="22.8349"
          style="stroke-width:0.264583"
          id="tspan871-2">Server</tspan></text>
     <rect
@@ -255,90 +321,124 @@
        id="rect837-3-5"
        width="15.875"
        height="10.583334"
-       x="48.947918"
-       y="10.583334" />
+       x="56.885418"
+       y="17.197916" />
     <text
        xml:space="preserve"
        style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="51.678352"
-       y="14.632818"
+       x="59.615852"
+       y="21.2474"
        id="text841-6-3"><tspan
          sodipodi:role="line"
          id="tspan839-7-5"
-         x="51.678352"
-         y="14.632818"
+         x="59.615852"
+         y="21.2474"
          style="stroke-width:0.264583">Remote</tspan><tspan
          sodipodi:role="line"
-         x="51.678352"
-         y="18.160606"
+         x="59.615852"
+         y="24.775188"
          style="stroke-width:0.264583"
          id="tspan871-6"> Portal</tspan></text>
-    <text
-       xml:space="preserve"
-       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="14.022915"
-       y="6.614583"
-       id="text937"><tspan
-         sodipodi:role="line"
-         id="tspan935"
-         x="14.022915"
-         y="6.614583"
-         style="stroke-width:0.264583">Local</tspan></text>
-    <text
-       xml:space="preserve"
-       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="58.567238"
-       y="6.5149798"
-       id="text937-7"><tspan
-         sodipodi:role="line"
-         id="tspan935-0"
-         x="58.567238"
-         y="6.5149798"
-         style="stroke-width:0.264583">Internet</tspan></text>
     <path
-       style="fill:none;stroke:#000000;stroke-width:0.265;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:none;marker-start:url(#Arrow1Mstart);marker-end:url(#Arrow1Mend)"
-       d="m 19.84375,15.875 h 6.614583"
+       style="fill:none;stroke:#000000;stroke-width:0.265;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#Arrow1Mstart);marker-end:url(#Arrow1Mend)"
+       d="m 19.84375,22.489584 h 6.614583"
        id="path963" />
     <path
        style="fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#marker1437);marker-end:url(#marker1385)"
-       d="m 42.333333,15.875 h 6.614583"
-       id="path965" />
+       d="m 42.333333,22.489584 14.552084,1e-6"
+       id="path965"
+       sodipodi:nodetypes="cc" />
     <path
        style="fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#marker1513);marker-end:url(#marker1583)"
-       d="m 64.822916,15.875 h 6.614583"
+       d="m 72.760416,22.489583 h 6.614583"
        id="path967" />
+    <rect
+       style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.213809;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       id="rect837-2"
+       width="15.875"
+       height="10.583334"
+       x="31.75"
+       y="5.2916665" />
     <text
        xml:space="preserve"
-       style="font-size:2.11667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="37.980984"
-       y="25.146349"
-       id="text1653"><tspan
+       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
+       x="36.17728"
+       y="11.547029"
+       id="text841-0"><tspan
          sodipodi:role="line"
-         id="tspan1651"
-         x="37.980984"
-         y="25.146349"
-         style="stroke-width:0.264583">Portal to Portal</tspan></text>
+         id="tspan839-2"
+         x="36.17728"
+         y="11.547029"
+         style="stroke-width:0.264583">Alice</tspan></text>
+    <rect
+       style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.213809;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       id="rect837-37"
+       width="15.875"
+       height="10.583334"
+       x="51.59375"
+       y="5.2916665" />
     <text
        xml:space="preserve"
-       style="font-size:2.11667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="14.490785"
-       y="25.079409"
-       id="text1653-9"><tspan
+       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
+       x="57.304562"
+       y="11.228348"
+       id="text841-5"><tspan
          sodipodi:role="line"
-         id="tspan1651-3"
-         x="14.490785"
-         y="25.079409"
-         style="stroke-width:0.264583">Client to Portal</tspan></text>
+         id="tspan839-9"
+         x="57.304562"
+         y="11.228348"
+         style="stroke-width:0.264583">Bob</tspan></text>
+    <rect
+       style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.213809;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       id="rect837-2-2"
+       width="15.875"
+       height="10.583334"
+       x="31.75"
+       y="29.104168" />
     <text
        xml:space="preserve"
-       style="font-size:2.11667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
-       x="61.344189"
-       y="25.172338"
-       id="text1653-6"><tspan
+       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
+       x="35.118946"
+       y="35.359531"
+       id="text841-0-2"><tspan
          sodipodi:role="line"
-         id="tspan1651-0"
-         x="61.344189"
-         y="25.172338"
-         style="stroke-width:0.264583">Portal to Server</tspan></text>
+         id="tspan839-2-8"
+         x="35.118946"
+         y="35.359531"
+         style="stroke-width:0.264583">Charlie</tspan></text>
+    <rect
+       style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.213809;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       id="rect837-37-9"
+       width="15.875"
+       height="10.583334"
+       x="51.59375"
+       y="29.104168" />
+    <text
+       xml:space="preserve"
+       style="font-size:2.82223px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
+       x="56.246227"
+       y="35.570019"
+       id="text841-5-7"><tspan
+         sodipodi:role="line"
+         id="tspan839-9-3"
+         x="56.246227"
+         y="35.570019"
+         style="stroke-width:0.264583">Dave</tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#marker3955);marker-end:url(#marker3955)"
+       d="m 46.302083,15.875 v 3.96875 h -3.96875"
+       id="path3551" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:0.265;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:none;marker-start:url(#marker3643);marker-end:url(#marker3643)"
+       d="m 46.302083,29.104166 v -3.96875 h -3.96875"
+       id="path3553" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#marker3567);marker-end:url(#marker3567)"
+       d="m 52.916666,15.875 v 3.96875 h 3.96875"
+       id="path3555" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#marker3737);marker-end:url(#marker3737)"
+       d="m 52.916666,29.104166 v -3.96875 h 3.96875"
+       id="path3557" />
   </g>
 </svg>