\begin{frame} % % To explain the paper's contribution we can simply break down the title: % privacy-preserving and incrementally deployable support for Certificate % Transparency in Tor. % % To make a long story short, Tor Browser does not support Certificate % Transparency. The reason why you want to do that is because it makes it % possible to detect if visited websites are being impersonated or not. % % For example, an attacker may want to impersonate a website to steal a % user's credit card number. It is also helpful to de-anonymize a Tor user. % % So, our work focus on adding support for Certificate Transparency in Tor % Browser. We do that while focusing on two key properties. % % The proposed solution should be _privacy-preserving_. We achieve this % because of and how we use Tor. % % The proposed solution should also be incrementally-deployable, and in the % end have a stronger threat model than current Certificate Transparency % deployments in Chrome and Safari that trust so-called CT logs blindly. % % In more detail, our incrementally-deployable design goes from: % pairs of CT logs that are trusted blindly, to % at least one CT log is trusted blindly, to % no CT log that is trusted blindly. % % It is fair to say that we have a strong threat model where the attacker % even has a zero-day exploit against Tor Browser. In spite of this very % strong threat model, the involved performance overhead is modest. % % For more detail, please refer to our paper and/or watch the presentation. % \mktitle{Breaking down the title} \begin{columns} \begin{column}{0.55\textwidth} \begin{itemize} \item Support Certificate Transparency in Tor \item Privacy-Preserving \item Incrementally-deployable \end{itemize} \end{column} \begin{column}{0.45\textwidth} \centering\includegraphics[width=.5\columnwidth]{img/tb} \end{column} \end{columns} \footnotetext[1]{\tiny{Paper: \url{https://petsymposium.org/2021/files/papers/issue2/popets-2021-0024.pdf}}} \footnotetext[2]{\tiny{Presentation: \url{https://www.youtube.com/watch?v=f7yDJOd6g3U}}} \end{frame}