Master Thesis as published at INS in 2022
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\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}