\documentclass[naustrian,notes]{beamer}

\input{header}
%Titelinformationen
\title[Digidow Biometric Sensor]{Digital Shadow: Biometric Sensor}
\subtitle{Master's Thesis Seminar}
\author[Michael Preisach]{Michael Preisach}
\date{November 19, 2019}
\institute[INS]{\includegraphics[width=0.1\textwidth]{../../resources/ins}}

\begin{document}
\begin{frame}
	\titlepage
\end{frame}
	
\begin{frame}
	\frametitle{Project Overview Digital Shadow}
	\begin{figure}
		\centering
		\includegraphics[width=0.9\textwidth]{../../resources/globalview}
	\end{figure}
\end{frame}

\begin{frame}
	\frametitle{Recap: Trust inside Biometric Sensor}
	\begin{itemize}
		\item manufacturer of TPM holds certificate
		\item TPM holds measurements of boot chain in PCR
		\begin{itemize}
			\item CRTM measures BIOS
			\item BIOS measures MBR/EFI Bootloader
			\item bootloader measures Kernel (Grub 2.04 supports TPM2)
			\item Kernel measures libs, executables, \ldots
		\end{itemize}
		\item TPM Quote: summarize the PCR state and sign it with TPM Endorsement Key (EK)
	\end{itemize}
\end{frame}

\begin{frame}
	\frametitle{Problem: Create trust beween BS and PA}
	\begin{itemize}
		\item network discovery
		\item \textbf{no Knowledge about BS}
		\begin{itemize}
			\item \textbf{Hardware}
			\item \textbf{Software}
			\item \textbf{Am I talking to a valid BS}
			\item Correct client to certify identity for given biometric data
		\end{itemize}
		\item \textbf{BS faces same problem with PA}
		\item establish a secure channel to submit sensitive data
	\end{itemize}
\end{frame}

\begin{frame}
	\frametitle{Solution: Direct Anonymous Attestation (DAA)}
	\begin{itemize}
		\item based on group signatures
		\item Zero Knowledge Proof to verify group membership
		\item defines 3 Parties
		\begin{itemize}
			\item Issuer: provides public key for a group (e.g. all Biometric Sensors) and manages group memberships
			\item Member: holds a group private key to sign messages (e.g. a Biometric Sensor)
			\item Verifier: knows the group public key and is able to verify correctness of signature (e.g. Personal Agent)
		\end{itemize}
		\item used DAA is based on Elliptic Curves (ECDAA)
	\end{itemize}
\end{frame}



\end{document}
