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[Assignment 4] 2.3 protocol colored

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bmh04 2024-05-27 13:02:58 +02:00
parent fd0d3d5f12
commit edf0d79c20
Signed by: chronal
GPG key ID: 2534798AB6C297E0
2 changed files with 3 additions and 5 deletions
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Assignment 4 - Protokollsicherheit (Praxis)/abgabe.pdf
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Assignment 4 - Protokollsicherheit (Praxis)/abgabe.tex
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@ -152,15 +152,13 @@
% Bob starts Protocol % Bob starts Protocol
\package{10, -2}{5, -2}{\(N_B\)} \package{10, -2}{5, -2}{\(N_B\)}
% Eve sends own Nonce (not necessary, but possible) % Eve sends own Nonce (not necessary, but possible)
\package{5, -3}{0, -3}{\(N_E\)} \package{5, -3}{0, -3}{\textcolor{red}{\(N_E\)}}
% Alice answers % Alice answers
\package{0, -4}{5, -4}{\(N_A, N_E, ID_B, \text{Sig}_A(N_A, N_E, ID_B)\)} \package{0, -4}{5, -4}{\(N_A, N_E, ID_B, \text{Sig}_A(N_A, N_E, ID_B)\)}
% Eve uses Bob as oracle - starts a new connection with Bob to obtain the Signature % Eve uses Bob as oracle - starts a new connection with Bob to obtain the Signature
\package{5, -5}{10, -5}{\(N_A\)} \textcolor{red}{\package{5, -5}{10, -5}{\(N_A\)}}
% Bob answers with the needed signature % Bob answers with the needed signature
\package{10, -6}{5, -6}{\(N_B', N_A, ID_A, \text{Sig}_B(N_B', N_A, ID_A)\)} \package{10, -6}{0, -6}{\(N_B', N_A, ID_A, \text{Sig}_B(N_B', N_A, ID_A)\)}
% Eve forwards this to Alice who now approves the signature and thinks Eve is Bob.
\package{5, -6}{0, -6}{\(N_B', N_A, ID_A, \text{Sig}_B(N_B', N_A, ID_A)\)}
} }
\textbf{Assumptions} \textbf{Assumptions}
\begin{enumerate}[(1)] \begin{enumerate}[(1)]