## 5 Use Case of 6G-OPENSEC-Security
### Applying ML/DL and Security Policies
#### 5.3.2 Security Decision  
This is the component with a higher degree of responsibility in the CL Automation subdomain of the Security CL. Its focus is on evaluating specific security data insights and determining the immediate responses required. While the CLM oversees the broader strategy and direction, the Security Decision component delves deeper into the specifics of immediate threat response based on real-time data.  
_Key Features/Responsibilities:_  
* **Data Analysis Interpretation**: The Security Decision component interprets the data analysed by the Security Data Analytics to determine potential immediate threats or anomalies.
* **Immediate Response Determination**: Based on the interpreted data, the Security Decision component determines immediate actions, actions such as blocking a suspicious IP, adjusting a firewall rule, or temporarily isolating a network segment are part of them. As described before, the focus will always be on immediate, tactical responses to any real-time threats.
* **Feedback Integration for Tactical Decisions**: Like most system components, the security decision component refines its decision-making algorithms based on feedback from previous immediate responses, ensuring a swift and accurate reaction to future threats.
* **Severity Assessment**: It evaluates the severity of detected anomalies or threats, prioritising responses based on potential impact and immediacy.
* **Interface with Response Mechanisms**: Once an immediate action is determined, the Security Decision component interfaces with the necessary system components to execute it, be it network configurations, security tools, or alert systems in case of issue escalation.  
Table 4 shows an overview of the modules that are part of the Security Decision component and their functionalities.  
In Figure 10, we can identify the internal interactions of the Security Decision subcomponents.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Subcomponent** & **Purpose** & **Key Features** & **Interfaces** \\ \hline \multirow{3}{*}{**Threat Assessment (TA)**} & Evaluates risks of detected anomalies & Threat Categorization Threat/SSLA association & **Input** SDA anomaly reports/flags **Output**: Categorizes threats & **Input** SDA anomaly reports/flags **Output**: Categorizes threats & **Input** SDA anomaly reports/flags **Output**: Categorizes threats & **Input** SDA anomaly reports/flags **Output**: Categorizes threats & **Output**: Categorizes threats \\  & & & & **per SSLAs. \\ \hline \multirow{3}{*}{**Decision Engine (DE)**} & Determines action based on TA assessment. & Action Mapping & **Input** Policies, action sets, playbooks **Output**: Chosen response, escalation alerts & **Input** SDA anomaly reports/flags **Output**: Categorizes threats \\  & & & & **set**s, playbooks **Output**: Chosen response, escalation alerts & **Input** Config parameters for SCL/threat alerts/Pcap **Output**: System feedback/status updates \\ \hline \multirow{3}{*}{**Policy Compliance (PC)**} & Maintaining security policies for decision-making & Policy Storage \& Retrieval Policy Compliance Revision & **Input** SSLA\&P policy requirements for compliance. **Output**: Delivers policies to DE, logs for audit/version. \\  & Logs decisions/incidents for audit trail, generates reports for analysis/compliance & Mitigation Logs Generate Logs & **Input** Incident data, user feedback. **Output**: Mitigation logs, reports. \\ \hline \hline \end{tabular}
\end{table}
Table 4: Security Decision subcomponents and their functionalities.