Add presentation from cryptofest 2018

6 files changed, 731 insertions, 4 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
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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
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diff --git a/README.md b/README.md
index d3bc1e7..5077ede 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,16 @@
 My talks
 ========
 
-Turris: Od Omnie k MOXu a 4.0
------------------------------
+Bezpečné doručení distribučních balíčků (2018 Cryptofest)
+---------------------------------------------------------
+[pdf](https://git.cynerd.cz/presentations/plain/2018-cryptofest/pres.pdf)
+
+Turris: Od Omnie k MOXu a 4.0 (2018 Opencamp)
+---------------------------------------------
 [pdf](https://git.cynerd.cz/presentations/plain/2018-opencampbr/pres.pdf)
 
-Domácí wifi síť s OpenWRT
--------------------------
+Domácí wifi síť s OpenWRT (2018 Installfest)
+--------------------------------------------
 [pdf](https://git.cynerd.cz/presentations/plain/2018-installfest/pres.pdf)
 
 Tipy a triky nejenom  v shellu nejenom pro programátory (2017 Linuxday)