## 6 Data Analysis
### Analysis of BYOD Security Policy Techniques Based on Privacy and Security Requirements
#### 6.2.1. Techniques that Satisfy Only One of the Privacy and Security Requirements  
This section describes the findings of previous studies related to proposed policy technologies based on how well they meet privacy and security criteria. As stated in Section 3.2, the requirements for BYOD security were classified into seven categories. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Ref** & **Requirement under Consideration** & **Purpose for the Evaluation** & **Evaluation Metrics** \\ \hline
[56] & Confidentiality. & To evaluate the performance of PTA protocol. & Computation cost and performance consumption. \\
[57] & Confidentiality. & To evaluate the response time for each subsequent request. Protecting BYOD users and network privacy with practical effect on communication performance. & Time complexity, communication costs and communications complexity. \\
[59] & Confidentiality. & To ensure the proper handshaking time between clients and serves. & Cost and exchange key time. \\
[61,64] & Confidentiality. & To reduce the delay in access time and run time. & Access time, power consumption and switching cost. \\
[62] & Confidentiality. & To evaluate the scalability of the approach. & CPU usage, memory usage and boot time. \\
[65] & Confidentiality. & To evaluate memory resource usage and power consumption due to virtualization. & Run-time memory usage and power consumption. \\ \hline \hline \end{tabular}
\end{table} 
Table 14: Summary of evaluation metrics. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Ref** & **Requirement under Consideration** & **Purpose for the Evaluation** & **Evaluation Metrics** \\ \hline
[56] & Confidentiality. & To evaluate the performance of PTA protocol. & Computation cost and performance consumption. \\
[57] & Confidentiality. & To evaluate the response time for each subsequent request. Protecting BYOD users and network privacy with practical effect on communication performance. & Execution time, complexity of the costs and communications complexity. \\
[58] & Confidentiality. & To evaluate the performance of broadcast communication performance. & \\
[59] & Confidentiality. & To ensure the proper handshaking time between clients and serves. & Cost and exchange key time. \\
[61,64] & Confidentiality. & To reduce the delay in access time and run time. & Access time, power consumption and switching cost. \\
[62] & Confidentiality. & To evaluate the scalability of the approach. & CPU usage, memory usage and boot time. \\
[65] & Confidentiality. & To evaluate memory resource usage and power consumption due to virtualization. & Run-time memory usage and power consumption. \\ \hline \hline \end{tabular}
\end{table} 
Table 13: Summary of evaluation metrics. These are confidentiality, integrity, availability, non-repudiation, authentication, privacy preservation, and attack detection. These requirements contributed to the creation of the review-related taxonomy. Figure 7 illustrates the taxonomy of security policies and privacy techniques based on the security requirements in BYOD environments, which include the seven categories described above. It can be seen that some techniques address one aspect of privacy and security criteria. For instance, confidentiality requirements have been met through cryptographic techniques and isolation techniques. Authentication algorithms can address authenticity requirements. Machine learning algorithms, deep learning algorithms, and SDN techniques have accomplished attack detection requirements. According to the review's findings, a technique that satisfies integrity, privacy, availability and non-repudiation requirements alone cannot be produced. As seen in Figure 7, we labelled this with the symbol NA, indicating non-availability. After analysing and categorising previous research results, we failed to identify any research that addressed just these categories.