Add presentation from cryptofest 2018

5 files changed, 723 insertions, 0 deletions

diff --git a/2018-cryptofest/makefile b/2018-cryptofest/makefile
new file mode 100644
index 0000000..9ab8f60
--- /dev/null
+++ b/2018-cryptofest/makefile
@@ -0,0 +1,10 @@
+FILE=pres
+
+$(FILE).pdf: $(FILE).tex $(patsubst %.svg,%.pdf,$(wildcard *.svg))
+	pdflatex -shell-escape $<
+
+%.pdf: %.svg
+	inkscape -D -z --file=$< --export-pdf=$@ --export-latex
+
+clean:
+	ls | grep -v -E "($(FILE).tex|makefile|scheme|svg|png|eps)$$" | xargs rm -rf
diff --git a/2018-cryptofest/package.svg b/2018-cryptofest/package.svg
new file mode 100644
index 0000000..47beed7
--- /dev/null
+++ b/2018-cryptofest/package.svg
@@ -0,0 +1,485 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   sodipodi:docname="package-x-generic.svg"
+   sodipodi:docbase="/home/jimmac/src/cvs/tango-icon-theme/scalable/mimetypes"
+   inkscape:version="0.46"
+   sodipodi:version="0.32"
+   id="svg2963"
+   height="48px"
+   width="48px"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape">
+  <defs
+     id="defs3">
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 24 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="48 : 24 : 1"
+       inkscape:persp3d-origin="24 : 16 : 1"
+       id="perspective77" />
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient5060"
+       id="radialGradient6719"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(-2.774389,0,0,1.969706,112.7623,-872.8854)"
+       cx="605.71429"
+       cy="486.64789"
+       fx="605.71429"
+       fy="486.64789"
+       r="117.14286" />
+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient5060">
+      <stop
+         style="stop-color:black;stop-opacity:1;"
+         offset="0"
+         id="stop5062" />
+      <stop
+         style="stop-color:black;stop-opacity:0;"
+         offset="1"
+         id="stop5064" />
+    </linearGradient>
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient5060"
+       id="radialGradient6717"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(2.774389,0,0,1.969706,-1891.633,-872.8854)"
+       cx="605.71429"
+       cy="486.64789"
+       fx="605.71429"
+       fy="486.64789"
+       r="117.14286" />
+    <linearGradient
+       id="linearGradient5048">
+      <stop
+         style="stop-color:black;stop-opacity:0;"
+         offset="0"
+         id="stop5050" />
+      <stop
+         id="stop5056"
+         offset="0.5"
+         style="stop-color:black;stop-opacity:1;" />
+      <stop
+         style="stop-color:black;stop-opacity:0;"
+         offset="1"
+         id="stop5052" />
+    </linearGradient>
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient5048"
+       id="linearGradient6715"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(2.774389,0,0,1.969706,-1892.179,-872.8854)"
+       x1="302.85715"
+       y1="366.64789"
+       x2="302.85715"
+       y2="609.50507" />
+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient2884">
+      <stop
+         style="stop-color:#000000;stop-opacity:1;"
+         offset="0"
+         id="stop2886" />
+      <stop
+         style="stop-color:#000000;stop-opacity:0;"
+         offset="1"
+         id="stop2888" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient2869">
+      <stop
+         style="stop-color:#ffffff;stop-opacity:1;"
+         offset="0"
+         id="stop2871" />
+      <stop
+         style="stop-color:#cccccc;stop-opacity:1.0000000;"
+         offset="1.0000000"
+         id="stop2873" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4995">
+      <stop
+         id="stop4997"
+         offset="0"
+         style="stop-color:#de9523;stop-opacity:1;" />
+      <stop
+         id="stop4999"
+         offset="1.0000000"
+         style="stop-color:#a36d18;stop-opacity:1.0000000;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4987"
+       inkscape:collect="always">
+      <stop
+         id="stop4989"
+         offset="0"
+         style="stop-color:#a0670c;stop-opacity:1;" />
+      <stop
+         id="stop4991"
+         offset="1"
+         style="stop-color:#a0670c;stop-opacity:0;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4979">
+      <stop
+         id="stop4981"
+         offset="0.0000000"
+         style="stop-color:#fbf0e0;stop-opacity:1.0000000;" />
+      <stop
+         id="stop4983"
+         offset="1.0000000"
+         style="stop-color:#f0ce99;stop-opacity:1.0000000;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4946"
+       inkscape:collect="always">
+      <stop
+         id="stop4948"
+         offset="0"
+         style="stop-color:#000000;stop-opacity:1;" />
+      <stop
+         id="stop4950"
+         offset="1"
+         style="stop-color:#000000;stop-opacity:0;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4222">
+      <stop
+         id="stop4224"
+         offset="0"
+         style="stop-color:#ffffff;stop-opacity:1;" />
+      <stop
+         id="stop4226"
+         offset="1.0000000"
+         style="stop-color:#ffffff;stop-opacity:0.68639052;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4210">
+      <stop
+         id="stop4212"
+         offset="0.0000000"
+         style="stop-color:#eaba6f;stop-opacity:1.0000000;" />
+      <stop
+         id="stop4214"
+         offset="1.0000000"
+         style="stop-color:#b97a1b;stop-opacity:1.0000000;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4192">
+      <stop
+         id="stop4194"
+         offset="0"
+         style="stop-color:#e9b96e;stop-opacity:1;" />
+      <stop
+         id="stop4196"
+         offset="1.0000000"
+         style="stop-color:#f1d19e;stop-opacity:1.0000000;" />
+    </linearGradient>
+    <linearGradient
+       id="linearGradient4182">
+      <stop
+         id="stop4184"
+         offset="0.0000000"
+         style="stop-color:#a36d18;stop-opacity:1.0000000;" />
+      <stop
+         id="stop4186"
+         offset="1.0000000"
+         style="stop-color:#d79020;stop-opacity:1.0000000;" />
+    </linearGradient>
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4946"
+       id="radialGradient2252"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(1.000000,0.000000,0.000000,0.333333,2.658463e-16,23.58206)"
+       cx="22.930462"
+       cy="35.373093"
+       fx="22.930462"
+       fy="35.373093"
+       r="17.576654" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4979"
+       id="linearGradient2269"
+       gradientUnits="userSpaceOnUse"
+       x1="30.062469"
+       y1="13.444801"
+       x2="17.696169"
+       y2="12.333632" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4995"
+       id="linearGradient2274"
+       gradientUnits="userSpaceOnUse"
+       x1="36.288929"
+       y1="14.661557"
+       x2="47.065835"
+       y2="15.267649" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4192"
+       id="linearGradient2277"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(1.000000,0.000000,0.000000,0.986355,0.000000,0.316638)"
+       x1="25.381256"
+       y1="24.720648"
+       x2="24.119167"
+       y2="16.170370" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4182"
+       id="linearGradient2280"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(1.000000,0.000000,0.000000,1.039184,0.000000,-4.057054e-2)"
+       x1="16.148972"
+       y1="12.636667"
+       x2="34.193642"
+       y2="12.636667" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4987"
+       id="linearGradient2282"
+       gradientUnits="userSpaceOnUse"
+       x1="21.906841"
+       y1="9.7577486"
+       x2="22.071806"
+       y2="16.020695" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4222"
+       id="linearGradient2285"
+       gradientUnits="userSpaceOnUse"
+       x1="18.706615"
+       y1="19.912336"
+       x2="30.014812"
+       y2="47.388485" />
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient4210"
+       id="linearGradient2288"
+       gradientUnits="userSpaceOnUse"
+       x1="24.990499"
+       y1="34.004856"
+       x2="24.990499"
+       y2="22.585211" />
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient2884"
+       id="radialGradient2896"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(1.353283,5.468101e-16,-1.144754e-13,0.635968,-8.458890,3.413470)"
+       cx="23.943670"
+       cy="20.800287"
+       fx="23.943670"
+       fy="20.800287"
+       r="6.4286140" />
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient2869"
+       id="radialGradient2898"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(0.749420,0.000000,0.000000,0.394055,6.226925,10.09253)"
+       cx="21.578989"
+       cy="9.0255041"
+       fx="21.578989"
+       fy="9.0255041"
+       r="9.5862970" />
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient2884"
+       id="radialGradient2906"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(1.353283,5.468101e-16,-1.144754e-13,0.635968,-8.458890,3.413470)"
+       cx="23.943670"
+       cy="20.800287"
+       fx="23.943670"
+       fy="20.800287"
+       r="6.4286140" />
+    <radialGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient2869"
+       id="radialGradient2908"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="matrix(0.749420,0.000000,0.000000,0.394055,6.226925,10.09253)"
+       cx="21.578989"
+       cy="9.8105707"
+       fx="21.578989"
+       fy="9.8105707"
+       r="9.5862970" />
+  </defs>
+  <sodipodi:namedview
+     inkscape:window-y="142"
+     inkscape:window-x="392"
+     inkscape:window-height="706"
+     inkscape:window-width="872"
+     stroke="#c17d11"
+     fill="#e9b96e"
+     inkscape:showpageshadow="false"
+     inkscape:document-units="px"
+     inkscape:grid-bbox="true"
+     showgrid="false"
+     inkscape:current-layer="layer1"
+     inkscape:cy="39.004018"
+     inkscape:cx="74.637005"
+     inkscape:zoom="1"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     borderopacity="0.16470588"
+     bordercolor="#666666"
+     pagecolor="#ffffff"
+     id="base" />
+  <metadata
+     id="metadata4">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title>Package</dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Jakub Steiner</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:source>http://jimmac.musichall.cz/</dc:source>
+        <dc:subject>
+          <rdf:Bag>
+            <rdf:li>package</rdf:li>
+            <rdf:li>archive</rdf:li>
+            <rdf:li>tarball</rdf:li>
+            <rdf:li>tar</rdf:li>
+            <rdf:li>bzip</rdf:li>
+            <rdf:li>gzip</rdf:li>
+            <rdf:li>zip</rdf:li>
+            <rdf:li>arj</rdf:li>
+            <rdf:li>tar</rdf:li>
+            <rdf:li>jar</rdf:li>
+          </rdf:Bag>
+        </dc:subject>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/publicdomain/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/publicdomain/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:groupmode="layer"
+     inkscape:label="Layer 1"
+     id="layer1">
+    <g
+       style="display:inline"
+       transform="matrix(2.105461e-2,0,0,2.086758e-2,42.60172,35.4036)"
+       id="g6707">
+      <rect
+         style="opacity:0.40206185;color:black;fill:url(#linearGradient6715);fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:round;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;visibility:visible;display:inline;overflow:visible"
+         id="rect6709"
+         width="1339.6335"
+         height="478.35718"
+         x="-1559.2523"
+         y="-150.69685" />
+      <path
+         style="opacity:0.40206185;color:black;fill:url(#radialGradient6717);fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:round;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;visibility:visible;display:inline;overflow:visible"
+         d="M -219.61876,-150.68038 C -219.61876,-150.68038 -219.61876,327.65041 -219.61876,327.65041 C -76.744594,328.55086 125.78146,220.48075 125.78138,88.454235 C 125.78138,-43.572302 -33.655436,-150.68036 -219.61876,-150.68038 z "
+         id="path6711"
+         sodipodi:nodetypes="cccc" />
+      <path
+         sodipodi:nodetypes="cccc"
+         id="path6713"
+         d="M -1559.2523,-150.68038 C -1559.2523,-150.68038 -1559.2523,327.65041 -1559.2523,327.65041 C -1702.1265,328.55086 -1904.6525,220.48075 -1904.6525,88.454235 C -1904.6525,-43.572302 -1745.2157,-150.68036 -1559.2523,-150.68038 z "
+         style="opacity:0.40206185;color:black;fill:url(#radialGradient6719);fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:round;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;visibility:visible;display:inline;overflow:visible" />
+    </g>
+    <rect
+       ry="2.3944440"
+       rx="2.4241352"
+       y="15.275433"
+       x="7.4623847"
+       height="23.112879"
+       width="31.978371"
+       id="rect3115"
+       style="opacity:1.0000000;color:#000000;fill:url(#linearGradient2288);fill-opacity:1.0000000;fill-rule:nonzero;stroke:#a0670c;stroke-width:1.0000007;stroke-linecap:butt;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible" />
+    <rect
+       style="opacity:0.48101267;color:#000000;fill:none;fill-opacity:1.0000000;fill-rule:nonzero;stroke:url(#linearGradient2285);stroke-width:1.0000011;stroke-linecap:butt;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible"
+       id="rect4220"
+       width="29.804138"
+       height="21.075352"
+       x="8.4989996"
+       y="16.243698"
+       rx="1.2846882"
+       ry="1.2846882" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path4162"
+       d="M 8.7697819,16.547178 L 13.819731,9.7363408 L 32.615291,9.6353255 L 37.835264,16.408941 L 8.7697819,16.547178 z "
+       style="fill:url(#linearGradient2280);fill-opacity:1.0000000;fill-rule:evenodd;stroke:url(#linearGradient2282);stroke-width:1.0000008;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-opacity:1.0000000" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path4164"
+       d="M 38.276321,16.325703 L 43.469269,23.520364 L 3.9609455,23.520364 L 8.6250143,16.320763 L 38.276321,16.325703 z "
+       style="opacity:1.0000000;color:#000000;fill:url(#linearGradient2277);fill-opacity:1.0000000;fill-rule:nonzero;stroke:#a0670c;stroke-width:1.0000005;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path4178"
+       d="M 32.849333,9.6141009 L 37.532219,16.536370 L 46.565835,20.921197 L 38.451329,12.008545 L 32.849333,9.6141009 z "
+       style="opacity:1.0000000;color:#000000;fill:url(#linearGradient2274);fill-opacity:1.0000000;fill-rule:nonzero;stroke:#a0670c;stroke-width:1.0000005;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       style="opacity:1.0000000;color:#000000;fill:#f8e8cf;fill-opacity:1.0000000;fill-rule:nonzero;stroke:#a0670c;stroke-width:1.0000000;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible"
+       d="M 13.617702,9.7151161 L 9.6419233,16.435355 L 0.50729183,20.820182 L 8.6217973,11.907530 L 13.617702,9.7151161 z "
+       id="path4180" />
+    <path
+       style="opacity:1.0000000;color:#000000;fill:none;fill-opacity:1.0000000;fill-rule:nonzero;stroke:#f4e3ca;stroke-width:1.0000000;stroke-linecap:butt;stroke-linejoin:miter;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:block;overflow:visible"
+       d="M 37.024959,16.436050 L 41.478871,22.493011 L 5.6482792,22.493011 L 9.7892982,16.312694 L 37.024959,16.436050 z "
+       id="path4954"
+       sodipodi:nodetypes="ccccc" />
+    <g
+       id="g2892"
+       transform="matrix(0.676538,0.000000,0.000000,1.000000,3.994869,0.000000)">
+      <path
+         style="opacity:1.0000000;color:#000000;fill:url(#radialGradient2896);fill-opacity:1.0000000;fill-rule:evenodd;stroke:none;stroke-width:2.0000000;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:inline;overflow:visible"
+         d="M 23.926073,12.101621 C 18.588065,12.101621 14.282569,14.129809 14.282569,16.641813 L 33.604773,16.641813 C 33.604773,14.129809 29.264081,12.101621 23.926073,12.101621 z "
+         id="path2882" />
+      <path
+         id="path2141"
+         d="M 23.931961,12.861168 C 20.379986,12.861168 17.515057,14.210748 17.515057,15.882266 L 30.372285,15.882266 C 30.372285,14.210748 27.483936,12.861168 23.931961,12.861168 z "
+         style="opacity:1.0000000;color:#000000;fill:url(#radialGradient2898);fill-opacity:1.0000000;fill-rule:evenodd;stroke:none;stroke-width:2.0000000;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:inline;overflow:visible" />
+    </g>
+    <g
+       transform="matrix(0.676538,0.000000,0.000000,1.000000,10.49487,0.000000)"
+       id="g2900">
+      <path
+         id="path2902"
+         d="M 23.926073,12.101621 C 18.588065,12.101621 14.282569,14.129809 14.282569,16.641813 L 33.604773,16.641813 C 33.604773,14.129809 29.264081,12.101621 23.926073,12.101621 z "
+         style="opacity:1.0000000;color:#000000;fill:url(#radialGradient2906);fill-opacity:1.0000000;fill-rule:evenodd;stroke:none;stroke-width:2.0000000;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:inline;overflow:visible" />
+      <path
+         style="opacity:1.0000000;color:#000000;fill:url(#radialGradient2908);fill-opacity:1.0000000;fill-rule:evenodd;stroke:none;stroke-width:2.0000000;stroke-linecap:round;stroke-linejoin:round;marker:none;marker-start:none;marker-mid:none;marker-end:none;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.0000000;stroke-opacity:1.0000000;visibility:visible;display:inline;overflow:visible"
+         d="M 23.931961,12.861168 C 20.379986,12.861168 17.515057,14.210748 17.515057,15.882266 L 30.372285,15.882266 C 30.372285,14.210748 27.483936,12.861168 23.931961,12.861168 z "
+         id="path2904" />
+    </g>
+    <path
+       style="opacity:0.87974685;fill:none;fill-opacity:1.0000000;fill-rule:evenodd;stroke:url(#linearGradient2269);stroke-width:1.0000000;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-opacity:1.0000000"
+       d="M 9.6523127,16.371803 L 13.036643,10.593020 L 33.514841,10.517799 L 37.356782,16.369880 L 9.6523127,16.371803 z "
+       id="path4966"
+       sodipodi:nodetypes="ccccc" />
+  </g>
+</svg>
diff --git a/2018-cryptofest/pres.pdf b/2018-cryptofest/pres.pdf
new file mode 100644
index 0000000..0b08ec3
--- /dev/null
+++ b/2018-cryptofest/pres.pdf
diff --git a/2018-cryptofest/pres.tex b/2018-cryptofest/pres.tex
new file mode 100644
index 0000000..8a9b8f6
--- /dev/null
+++ b/2018-cryptofest/pres.tex
@@ -0,0 +1,182 @@
+\documentclass[aspectratio=169]{beamer}
+\usetheme{metropolis}
+\usepackage{lmodern}
+\usepackage[czech]{babel}
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{graphicx}
+\usepackage{wrapfig}
+\usepackage{color}
+\usepackage{mathtools}
+\usepackage{hyperref}
+\usepackage{epstopdf}
+\usepackage{amsmath}
+\hypersetup{
+    colorlinks,
+    citecolor=black,
+    filecolor=black,
+    linkcolor=black,
+    urlcolor=black
+}
+\usepackage{pdflscape}
+
+\title{Bezpečné doručení distribučních balíčků}
+\author{Karel Kočí}
+\date{26.5.2018}
+
+\begin{document}
+
+\frame{\titlepage}
+
+\begin{frame}
+	\def\svgwidth{10cm}
+	\input{turris-logo.pdf_tex}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Balíček?}
+	\def\svgwidth{2cm}
+	\input{package.pdf_tex}
+
+	\begin{itemize}
+		\item Meta informace (název, verze, ...)
+		\item Soubory
+		\item Hashe pro soubory
+	\end{itemize}
+
+	Indexovány a uloženy v repositářích
+	\begin{itemize}
+		\item Repositář obsahuje index
+		\item Index obsahuje hashe balíčků a další meta informace
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Krypto terminologie}
+	\begin{itemize}
+		\item Hash
+		\item Asymetrická šifra
+		\item Kryptografický podpis
+		\item Certifikační autorita
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Útok \#1: Podvrhnutí repositářů}
+	\begin{itemize}
+		\item Vlastní server s upravenými balíčky distribuce
+		\item Kompromitace připojení k Internetu
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Ochrana \#1: Podpis}
+	\begin{itemize}
+		\item Před-distribuovaný veřejný klíč
+		\item Podepsané balíčky nebo index repositáře (lépe index)
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Útok \#2: Podvrhnutí starší verze repositářů}
+	\begin{itemize}
+		\item Kopie repositářů distribuce se známou zranitelností (Heartbleed,
+			CVE-2016-0777 CVE-2016-0778, ...)
+		\item Vlastní server se starší kopií repositářů distribuce
+		\item Kompromitace připojení k Internetu
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{``Ochrana'' \#2: Porovnání verzí}
+	Balíčky je možné pouze updatovat
+	\begin{itemize}
+		\item Downgrade je nutné schválit (ale jen u některých a uživatel...)
+		\item Downgrade je občas legitimní
+		\item Co update ze staré verze systému? (pravidelné aktualizace)
+		\item Co instalace?
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Ochrana \#2: HTTPS a SSL}
+	\begin{itemize}
+		\item Server s repositáři se ověřuje validním certifikátem
+		\item Identita serveru (jeho DNS jméno a pod.) je podepsána
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Útok \#3: Vlastní certifikát}
+	\begin{itemize}
+		\item Kopie repositářů distribuce se známou zranitelností
+		\item Vlastní server se starší kopií repositářů distribuce
+		\item Vlastní certifikát s totožnou identitou od "důvěryhodné" autority
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Ochrana \#3: Certification pinning}
+	\begin{itemize}
+		\item Omezit počet důvěryhodných certifikátů (pár vybraných)
+		\item Vždy mějte vlastní certifikační autoritu jako fallback!
+		\item Tak trochu hra v kostky
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Útok \#4: Podvrhnutí DNS}
+	\begin{itemize}
+		\item Kopie repositářů distribuce se známou zranitelností
+		\item Vlastní server se starší kopií repositářů distribuce
+		\item Kompromitace používaného DNS serveru (např: otrávení) a podvrhnutí
+			vlastní IP
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Ochrana \#4: DNSSEC}
+	\begin{itemize}
+		\item Kontrola správnosti DNS odpovědi pomocí podpisů
+		\item Odpověď je stejná tak jak ji poskytuje příslušný autoritativní
+			server
+	\end{itemize}
+
+	\begin{itemize}
+		\item Nutné správné nastavení systému nejenom aplikace
+		\item Nízké uvědomění uživatelů o užitečnosti DNSSEC
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Útok \#5: BGP leak IP}
+	\begin{itemize}
+		\item Kopie repositářů distribuce se známou zranitelností
+		\item Vlastní server se starší kopií repositářů distribuce
+		\item Zneužití BGP ohlašování a přesměrování 
+		\item Vlastní důvěryhodný certifikát s totožnou identitou (Let 's Encrypt)
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Ochrana \#5: RPKI}
+	\begin{itemize}
+		\item Kryptografické ověření přidělení ohlašované IP adresy
+	\end{itemize}
+
+	\begin{itemize}
+		\item Nižší rozšířenost
+		\item Uživatelsky nekontrolovatelné a nevynutitelné
+		\item Výrazně složitý útok
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Děkuji za pozornost}
+	Udržujte svoje systémy aktuální!
+
+	Nastavte si DNSSEC!
+\end{frame}
+
+
+\end{document}
diff --git a/2018-cryptofest/turris-logo.svg b/2018-cryptofest/turris-logo.svg
new file mode 100644
index 0000000..9b3dd77
--- /dev/null
+++ b/2018-cryptofest/turris-logo.svg
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   id="Vrstva_1"
+   x="0px"
+   y="0px"
+   viewBox="0 0 239.99999 84"
+   xml:space="preserve"
+   width="240"
+   height="84"><metadata
+     id="metadata29"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+     id="defs27" /><style
+     type="text/css"
+     id="style3">
+	.st0{fill:#00A2E2;}
+</style><g
+     id="g3357"
+     transform="matrix(0.77644775,0,0,0.77644775,-8.9499963e-8,0.723552)"><polygon
+       id="polygon5"
+       points="55.4,57.7 0,57.7 11.1,76.9 44.5,76.9 61.1,105.7 83.3,105.7 55.5,57.7 55.5,57.7 " /><polygon
+       id="polygon7"
+       points="86,52.9 102.7,24 91.6,4.8 63.9,52.9 91.6,101 102.7,81.8 " /><polygon
+       id="polygon9"
+       points="38.9,19.2 72.2,19.2 83.3,0 27.8,0 0,48.1 22.2,48.1 "
+       class="st0"
+       style="fill:#00a2e2" /><g
+       id="g11"><path
+         id="path13"
+         d="m 141.3,40.2 0,30 -9.1,0 0,-30 -10.7,0 0,-7.8 30.5,0 0,7.8 -10.7,0 z" /><path
+         id="path15"
+         d="m 187,62.1 c -0.8,1.9 -1.9,3.5 -3.3,4.8 -1.4,1.3 -3.1,2.4 -5.2,3.1 -2,0.7 -4.2,1.1 -6.7,1.1 -2.5,0 -4.7,-0.4 -6.7,-1.1 -2,-0.7 -3.7,-1.8 -5.1,-3.1 -1.4,-1.3 -2.5,-2.9 -3.2,-4.8 -0.7,-1.9 -1.1,-3.9 -1.1,-6.2 l 0,-23.5 9.1,0 0,22.8 c 0,1 0.1,2 0.4,2.9 0.3,0.9 0.7,1.8 1.2,2.5 0.6,0.7 1.3,1.3 2.2,1.7 0.9,0.4 2,0.6 3.3,0.6 1.3,0 2.4,-0.2 3.3,-0.6 0.9,-0.4 1.6,-1 2.2,-1.7 0.6,-0.7 1,-1.6 1.2,-2.5 0.2,-0.9 0.4,-1.9 0.4,-2.9 l 0,-22.8 9.1,0 0,23.5 c 0.1,2.3 -0.3,4.4 -1.1,6.2 z" /><path
+         id="path17"
+         d="m 215.8,70.2 -8.2,-15 -3.1,0 0,15 -8.9,0 0,-37.8 14.4,0 c 1.8,0 3.6,0.2 5.3,0.6 1.7,0.4 3.3,1 4.6,1.9 1.4,0.9 2.5,2.1 3.3,3.5 0.8,1.5 1.2,3.3 1.2,5.4 0,2.6 -0.7,4.7 -2.1,6.5 -1.4,1.7 -3.3,3 -5.8,3.7 l 9.9,16.2 -10.6,0 z m -0.4,-26.3 c 0,-0.9 -0.2,-1.6 -0.6,-2.2 -0.4,-0.6 -0.9,-1 -1.4,-1.3 -0.6,-0.3 -1.3,-0.5 -2,-0.6 -0.7,-0.1 -1.4,-0.2 -2.1,-0.2 l -4.9,0 0,8.8 4.3,0 c 0.8,0 1.5,-0.1 2.3,-0.2 0.8,-0.1 1.5,-0.3 2.1,-0.7 0.6,-0.3 1.2,-0.8 1.6,-1.4 0.5,-0.4 0.7,-1.2 0.7,-2.2 z" /><path
+         id="path19"
+         d="m 251.2,70.2 -8.2,-15 -3.1,0 0,15 -8.9,0 0,-37.8 14.4,0 c 1.8,0 3.6,0.2 5.3,0.6 1.7,0.4 3.3,1 4.6,1.9 1.4,0.9 2.5,2.1 3.3,3.5 0.8,1.5 1.2,3.3 1.2,5.4 0,2.6 -0.7,4.7 -2.1,6.5 -1.4,1.7 -3.3,3 -5.8,3.7 l 9.9,16.2 -10.6,0 z m -0.4,-26.3 c 0,-0.9 -0.2,-1.6 -0.6,-2.2 -0.4,-0.6 -0.9,-1 -1.4,-1.3 -0.6,-0.3 -1.3,-0.5 -2,-0.6 -0.7,-0.1 -1.4,-0.2 -2.1,-0.2 l -4.9,0 0,8.8 4.3,0 c 0.8,0 1.5,-0.1 2.3,-0.2 0.8,-0.1 1.5,-0.3 2.1,-0.7 0.6,-0.3 1.2,-0.8 1.6,-1.4 0.5,-0.4 0.7,-1.2 0.7,-2.2 z" /><path
+         id="path21"
+         d="m 266.4,70.2 0,-37.8 9.2,0 0,37.8 -9.2,0 z" /><path
+         id="path23"
+         d="m 303.3,42.2 c -0.8,-1 -1.8,-1.8 -3.1,-2.4 -1.3,-0.6 -2.5,-0.9 -3.7,-0.9 -0.6,0 -1.2,0.1 -1.8,0.2 -0.6,0.1 -1.2,0.3 -1.7,0.6 -0.5,0.3 -0.9,0.7 -1.3,1.2 -0.3,0.5 -0.5,1.1 -0.5,1.8 0,0.6 0.1,1.2 0.4,1.6 0.3,0.4 0.7,0.8 1.2,1.1 0.5,0.3 1.1,0.6 1.8,0.9 0.7,0.3 1.5,0.5 2.4,0.8 1.3,0.4 2.6,0.9 4,1.4 1.4,0.5 2.7,1.2 3.8,2.1 1.1,0.9 2.1,1.9 2.8,3.2 0.7,1.3 1.1,2.8 1.1,4.7 0,2.2 -0.4,4 -1.2,5.6 -0.8,1.6 -1.9,2.9 -3.2,3.9 -1.3,1 -2.9,1.8 -4.6,2.3 -1.7,0.5 -3.5,0.7 -5.4,0.7 -2.7,0 -5.3,-0.5 -7.8,-1.4 -2.5,-0.9 -4.6,-2.3 -6.3,-4 l 6,-6.1 c 0.9,1.1 2.1,2.1 3.7,2.9 1.5,0.8 3,1.1 4.5,1.1 0.7,0 1.3,-0.1 2,-0.2 0.6,-0.1 1.2,-0.4 1.7,-0.7 0.5,-0.3 0.9,-0.7 1.1,-1.3 0.3,-0.5 0.4,-1.2 0.4,-1.9 0,-0.7 -0.2,-1.3 -0.5,-1.8 -0.4,-0.5 -0.9,-1 -1.5,-1.4 -0.7,-0.4 -1.5,-0.8 -2.5,-1.1 -1,-0.3 -2.1,-0.7 -3.3,-1.1 -1.2,-0.4 -2.4,-0.9 -3.6,-1.4 -1.2,-0.5 -2.2,-1.2 -3.1,-2.1 -0.9,-0.8 -1.6,-1.9 -2.2,-3 -0.6,-1.1 -0.8,-2.6 -0.8,-4.4 0,-2.1 0.4,-3.9 1.3,-5.4 0.9,-1.5 2,-2.7 3.4,-3.7 1.4,-1 3,-1.7 4.7,-2.1 1.7,-0.4 3.5,-0.7 5.3,-0.7 2.1,0 4.3,0.4 6.5,1.2 2.2,0.8 4.2,1.9 5.8,3.5 l -5.8,6.3 z" /></g></g></svg>
\ No newline at end of file