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\begin{document}


        
\begin{slide}
\begin{center}
\LARGE{{\bf}DTLS 1.1}\\

\vspace{.3 in}
\large{Eric Rescorla}\\
\large{Network Resonance}\\
\large{\texttt{ekr@networkresonance.com}}

\end{center}
\end{slide}

\begin{slide}
\heading{Overview}

\begin{itemize}
\item Update to match TLS 1.2 
\begin{itemize}
\item Mostly \verb^s/TLS 1.1/TLS 1.2/^
\end{itemize}
\item Clarify confusing points in the spec
\item No other changes
\end{itemize}
\end{slide}


\begin{slide}
\heading{TLS 1.2 Upgrade}

\begin{itemize}
\item DTLS 1.0 is a delta off TLS 1.1
\begin{itemize}
\item This is intentional
\item Not clear you can just pick a random version (cf. TLS 1.0)
\end{itemize}
\item But now TLS 1.2 is out
\begin{itemize}
\item Need to upgrade
\end{itemize}
\item Proposal: Rev DTLS version to 1.1 and have it matched to TLS 1.2
\begin{itemize}
\item Question: would it be better to go to 1.2 to match versions?
\end{itemize}
\end{itemize}
\end{slide}

\begin{slide}
\heading{Known Issue 1: HelloVerifyRequest and CertificateVerify}

\begin{itemize}
\item S 4.1.2. specifies that the first ClientHello and HelloVerifyRequest
               are not included in Finished
\item Nothing is said about CertificateVerify
\item Proposal: it's not included there either        
\end{itemize}
\end{slide}


\begin{slide}
\heading{Handshake Headers and Hashes}

\vspace{-.5 in}

\begin{itemize}
\item DTLS handshake messages are:
\end{itemize}

{\small
\begin{verbatim}
      struct {
        HandshakeType msg_type;
        uint24 length;
        uint16 message_seq;                               // New field
        uint24 fragment_offset;                           // New field
        uint24 fragment_length;                           // New field
        ...
      }
\end{verbatim}
}

\begin{itemize}
\item How are handshake hashes computed with fragmentation
\begin{itemize}
\item Reassemble and then hash
\item Include the headers? 
\begin{itemize}
\item This isn't clear in the spec (answer is ``yes'' in TLS)
\end{itemize}
\end{itemize}
\item Proposal: change the text to make this clear
\end{itemize}
\end{slide}



\begin{slide}
\heading{Planned Timeline}

\begin{itemize}
\item Gather other issues
\begin{itemize}
\item Call on the mailing list
\item Have them by 31-April-08
\end{itemize}
\item Discusss contentious issued on mailing list
\item New draft by 31-May-08
\item Resolve final contentious issues in Dublin
\end{itemize}
\end{slide}


\end{document}