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198 |
198 |
199 \end{frame} |
199 \end{frame} |
200 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
200 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
201 |
201 |
202 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
202 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
203 \begin{frame}[t] |
203 \begin{frame}[t] |
204 \frametitle{Protocols} |
204 \frametitle{Protocols} |
205 |
205 |
206 \mbox{} |
206 \mbox{} |
207 |
207 |
208 \begin{tabular}{l} |
208 \begin{tabular}{l} |
209 {\Large \bl{$A\;\rightarrow\; B : \ldots$}}\\ |
209 {\Large \bl{$A\;\rightarrow\; B : \ldots$}}\\ |
219 \item<2-> there can be several sessions in parallel (think of wifi routers) |
219 \item<2-> there can be several sessions in parallel (think of wifi routers) |
220 \end{itemize} |
220 \end{itemize} |
221 |
221 |
222 \end{frame} |
222 \end{frame} |
223 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
223 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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224 |
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225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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226 \begin{frame}[t] |
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227 \frametitle{Messages} |
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228 |
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229 \mbox{} |
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230 |
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231 \begin{tabular}{l} |
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232 {\Large \bl{$A\;\rightarrow\; B : msg$}}\\ |
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233 \end{tabular}\bigskip |
224 |
234 |
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235 \begin{itemize} |
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236 \item Unencrypted: \bl{$msg$} |
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237 \item Random number (nonce): \bl{$N$} |
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238 \item Encrypted: \bl{$\{msg\}_K$}, \bl{$\{msg_1, msg_2\}_K$}, \bl{$\{\{msg\}_{K_1}\}_{K_2}$} |
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239 \end{itemize} |
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240 |
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241 \end{frame} |
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242 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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243 |
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244 |
225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
245 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
226 \begin{frame}[c] |
246 \begin{frame}[c] |
227 \frametitle{Handshakes} |
247 \frametitle{Handshakes} |
228 |
248 |
229 \begin{itemize} |
249 \begin{itemize} |