# Risk-Based Access Control Model: A Systematic Literature Review
## 6 Discussion
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Citation** & **Fuzzy Logic** & \begin{tabular}{c} **Machine** \\ **Learning** \\ \end{tabular} & \begin{tabular}{c} **Game** \\ **Theory** \\ \end{tabular} & \begin{tabular}{c} **Risk** \\ **Assessment** \\ \end{tabular} & \
\begin{tabular}{c} **Mathematical** \\ **Equation** \\ \end{tabular} &
\begin{tabular}{c} **Not** \\ **Discussed** \\ \end{tabular} \\ \hline [PERSON] et al. [4] & \(\surd\) & - & - & - & - & - \\ \hline [PERSON] et al. [20] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] et al. [28] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] and [PERSON] [50] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [32] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [44] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [46] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [34] & \(\surd\) & - & - & - & - & - \\ \hline [PERSON] et al. [47] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [27] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [33] & - & \(\surd\) & - & - & - & - \\ \hline [PERSON] and [PERSON] [39] & - & - & \(\surd\) & - & - & - \\ \hline [PERSON] et al. [36] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] and [PERSON] [15] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] and [PERSON] [35] & - & - & \(\surd\) & - & - & - \\ \hline [PERSON] et al. [25] & \(\surd\) & - & - & - & - & - \\ \hline [PERSON] and [PERSON] [57] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [38] & - & \(\surd\) & - & - & - & - \\ \hline [PERSON] et al. [5] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [40] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] and [PERSON] [26] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] et al. [48] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [13] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [37] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [6] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] et al. [24] & \(\surd\) & - & - & - & - & - \\ \hline [PERSON] et al. [53] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [1] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] and [PERSON] [45] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] et al. [23] & - & - & - & \(\surd\) & - & - \\ \hline [PERSON] et al. [31] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [56] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [30] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [22] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [49] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [41] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [43] & \(\surd\) & - & \(\surd\) & \(\surd\) & - & - \\ \hline [PERSON] et al. [54] & - & - & - & - & \(\surd\) & - \\ \hline [PERSON] et al. [52] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [9] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] et al. [42] & \(\surd\) & - & - & - & - & - \\ \hline [PERSON] et al. [51] & - & - & - & - & - & \(\surd\) \\ \hline [PERSON] and [PERSON] [29] & \(\surd\) & - & - & - & - & \(\surd\) \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Risk estimation techniques used in retrieved/analyzed publications of risk-based access control models.