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chg: [decaying] Improved slides

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mokaddem 2019-09-25 12:17:58 +02:00
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a.5-decaying-indicators/content.tex
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@ -5,6 +5,7 @@
\titlepage
\end{frame}
\section{Expiring IOCs: Why and How?}
\begin{frame}
\frametitle{Indicators - Problem Statement}
\begin{itemize}
@ -21,7 +22,7 @@
\vspace{0.5cm}
\item Attributes can be shared in large quantities (more than 7.3 million on \texttt{MISPPRIV})
\begin{itemize}
\item Partial info about their \textbf{freshness} (\textit{sightings})
\item Partial info about their \textbf{freshness} (\textit{Sightings})
\item Partial info about their \textbf{validity} (last update)
\end{itemize}
\item[] $\rightarrow$ Can be partially solved with our \textit{Decaying model}
@ -47,20 +48,30 @@
\frametitle{Organisations opt-in - setting a level of confidence}
MISP is a peer-to-peer system, information passes through multiple instances.
\begin{itemize}
\item Producers can add context (such as tags from \textit{taxonomies}, \textit{galaxies}) about their asserted confidence or the reliability of the data
\item Consumers can have different levels of trust in the producers and/or analysts themselves
\item \textbf{Producers can add context} (such as tags from \textit{Taxonomies}, \textit{Galaxies}) about their asserted confidence or the reliability of the data
\item Consumers can have \textbf{different levels of trust} in the producers and/or analysts themselves
\item Users might have other contextual needs
\end{itemize}
\begin{center}
$\rightarrow$ Achieved thanks to \textit{Taxonomies}
\end{center}
\end{frame}
\begin{frame}
\frametitle{Taxonomies - Refresher (1)}
\includegraphics[width=1.00\linewidth]{pics/taxonomies.png}
\begin{itemize}
\item Tagging is a simple way to attach a classification to an \textit{Event} or an \textit{Attribute}
\item Classification must be globally used to be efficient
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Taxonomies - Refresher (2)}
\includegraphics[width=1.00\linewidth]{pics/taxonomy-admiralty-scale.png}
\begin{center}
$\rightarrow$ Cherry-pick allowed \textit{Tags}
\end{center}
\end{frame}
\begin{frame}
@ -117,13 +128,22 @@
\item \texttt{score} $ \in [0, +\infty $
\item \texttt{base\_score} $ \in [0, 100] $
\item \texttt{decay} is a function defined by model's parameters controlling decay speed
\item \texttt{Attribute} Contains \textit{Attribute}'s values and metadata {\scriptsize (\textit{Taxonomies}, \textit{Galaxies}, ...)}
\item \texttt{Model} Contains the \textit{Model}'s configuration
\end{itemize}
\end{frame}
\section{Current implementation in MISP}
\begin{frame}
\frametitle{Implementation in MISP: \texttt{Event/view}}
\includegraphics[width=1.00\linewidth]{pics/decaying-event.png}
\begin{itemize}
\item \texttt{Decay score} toggle button
\begin{itemize}
\item Shows Score for each \textit{Models} associated to the \textit{Attribute} type
\end{itemize}
\end{itemize}
\end{frame}
\begin{frame}[fragile]
@ -156,13 +176,14 @@
\frametitle{Implementation in MISP: Playing with Models}
\begin{itemize}
\item \textbf{Automatic scoring} based on default values
\item \textbf{User-friendly UI} to manually set lifetime and decay parameters
\item \textbf{User-friendly UI} to manually set \textit{Model} configuration (lifetime, decay, etc.)
\item \textbf{Simulation} tool
\item Interaction through the \textbf{API}
\item Opportunity to create your \textbf{own} formula or algorythm
\end{itemize}
\end{frame}
\section{Decaying Models in Depth}
\begin{frame}
\frametitle{Scoring Indicators: \texttt{base\_score} (1)}
$$ \texttt{score}(\texttt{\tiny Attribute}) = \texttt{base\_score}(\texttt{\tiny Attribute, Model}) \;\;\bullet\;\; {\color{gray}\texttt{decay}(\texttt{\tiny Model, time})} $$
@ -181,7 +202,7 @@
\begin{frame}
\frametitle{Scoring Indicators: \texttt{base\_score} (2)}
Current implentation ignore \texttt{source\_confidence}:
Current implentation ignores \texttt{source\_confidence}:
$$\rightarrow \texttt{base\_score} = tags$$
\includegraphics[width=1.0\linewidth]{pics/bs-computation-steps.png}
\end{frame}
@ -196,23 +217,25 @@
\item May vary depending on the indicator type
\item short for an IP, long for an hash
\end{itemize}
\item The \texttt{decay rate}, or speed at which an attribute loses value over time
\item The time elapsed since the latest update or sighting
\item The \texttt{decay rate}, or speed at which an attribute loses score over time
\item The \texttt{time} elapsed since the latest update or sighting
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Scoring Indicators: putting it all toghether}
$\rightarrow$ \texttt{decay rate} is \textbf{re-initialized upon sighting} addition, or said differently, the \texttt{score} is reset to its base score as new \textit{sightings} are applied.
$$score = base\_score \cdot \left( 1 - \left( \frac{t}{\tau_a} \right)^{\frac{1}{\delta_a}} \right) $$
$$score = base\_score \cdot \left( 1 - \left( \frac{t}{\tau} \right)^{\frac{1}{\delta}} \right) $$
\begin{itemize}
\item $\tau_a = $ \texttt{lifetime}
\item $\delta_a = $ \texttt{decay speed}
\item $\tau = $ \texttt{lifetime}
\item $\delta = $ \texttt{decay speed}
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Implementation in MISP: Models definition}
\hspace{190pt}
\raisebox{-1.0ex}{\Large $\Rsh$} {\tiny $score = base\_score \cdot \left( 1 - \left( \frac{t}{\tau} \right)^{\frac{1}{\delta}} \right) $}
\textit{Models} are an instanciation of the formula where elements can be defined:
\begin{itemize}
\item Parameters: \texttt{lifetime, decay\_rate, threshold}
@ -228,11 +251,11 @@
\frametitle{Implementation in MISP: Models Types}
Multiple model types are available
\begin{itemize}
\item Default models: Models created and shared by the community. Available from \texttt{misp-decaying-models} repository\footnote{\url{https://github.com/MISP/misp-decaying-models.git}}.
\item \textbf{Default Models}: Models created and shared by the community. Available from \texttt{misp-decaying-models} repository\footnote{\url{https://github.com/MISP/misp-decaying-models.git}}.
\begin{itemize}
\item $\rightarrow$ Not editable
\end{itemize}
\item Organisation models: Models created by a user belonging to an organisation
\item \textbf{Organisation Models}: Models created by a user belonging to an organisation
\begin{itemize}
\item These models can be hidden or shared to other organisation
\item $\rightarrow$ Editable
@ -243,21 +266,25 @@
\begin{frame}
\frametitle{Implementation in MISP: Index}
\includegraphics[width=1.00\linewidth]{pics/decaying-index.png}
View, update, add, create, delete, enable, export, import
\end{frame}
\begin{frame}
\frametitle{Implementation in MISP: Fine tuning tool}
\includegraphics[width=1.00\linewidth]{pics/decaying-tool.png}
Create, modify, visualise, perform mapping
\end{frame}
\begin{frame}
\frametitle{Implementation in MISP: \texttt{base\_score} tool}
\includegraphics[width=1.00\linewidth]{pics/decaying-basescore.png}
Adjust Taxonomies relative weights
\end{frame}
\begin{frame}
\frametitle{Implementation in MISP: simulation tool}
\includegraphics[width=1.00\linewidth]{pics/decaying-simulation.png}
Simulate \textit{Attributes} with different \textit{Models}
\end{frame}
\begin{frame}[fragile]