equal
deleted
inserted
replaced
91 $A \to B :$ & $\{K_{AB}\}_{K_{BS}}$\\ |
91 $A \to B :$ & $\{K_{AB}\}_{K_{BS}}$\\ |
92 $A \to B :$ & $\{m\}_{K_{AB}}$\\ |
92 $A \to B :$ & $\{m\}_{K_{AB}}$\\ |
93 \end{tabular} |
93 \end{tabular} |
94 \end{center} |
94 \end{center} |
95 |
95 |
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96 \item Explain briefly the purpose of the certification authority in |
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97 the public-private key encryption scheme. |
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98 |
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99 \item Explain briefly what is meant by a certification authority |
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100 becoming ``too big to fail'' when it has issued a large number |
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101 of certificates. |
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102 |
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103 \item In which situations does it make sense to install |
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104 invalid (self-signed) certificates? |
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105 |
96 |
106 |
97 \item \POSTSCRIPT |
107 \item \POSTSCRIPT |
98 \end{enumerate} |
108 \end{enumerate} |
99 \end{document} |
109 \end{document} |
100 |
110 |