equal
deleted
inserted
replaced
883 |
883 |
884 \bl{$C$} would have to invent a totally new message |
884 \bl{$C$} would have to invent a totally new message |
885 |
885 |
886 \end{frame}} |
886 \end{frame}} |
887 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
887 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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888 |
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889 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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890 \mode<presentation>{ |
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891 \begin{frame}[c] |
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892 \frametitle{Public-Key Infrastructure} |
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893 |
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894 \begin{itemize} |
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895 \item the idea is to have a certificate authority (CA) |
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896 \item you go to the CA to identify yourself |
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897 \item CA: ``I, the CA, have verified that public key \bl{$P^{pub}_{Bob}$} belongs to Bob''\bigskip |
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898 \item CA must be trusted by everybody |
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899 \item What happens if CA issues a false certificate? Who pays in case of loss? (VeriSign |
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900 explicitly limits liability to \$100.) |
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901 \end{itemize} |
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902 |
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903 \end{frame}} |
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904 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
888 |
905 |
889 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
906 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
890 \mode<presentation>{ |
907 \mode<presentation>{ |
891 \begin{frame}[c] |
908 \begin{frame}[c] |
892 \frametitle{Binding Attacks} |
909 \frametitle{Binding Attacks} |