# Quantum PSO-Based Optimization of Secured IRS-Assisted Wireless-Powered IoT Networks
### Related Work
#### 1.1.3 IRS-Assisted Secure Communication
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Reference** & **Network** & **Goal** & **Key Idea** & **Results/Outcomes** \\ \hline
[8] & Secure MIMO Systems with AN & AN-aided secure communications &
\begin{tabular}{c} BCD algorithm optimizes transmit \\ precoding matrix, artificial noise, \\ and IRS phase shift for secrecy. \\ \end{tabular} & Maximizes secrecy rate with IRS \\ \hline
[26] & WFINs & IRS-assisted secure WPIN & IRS enhances both WET and WIT \\  & & transmission & via passive reflection. \\ \hline
[27] & Multi-cluster IRS-assisted WPINs & \
\begin{tabular}{c} Secures a multi-cluster WPIN with \\ an IRS \\ \end{tabular} &
\begin{tabular}{c} A hybrid time-frequency division \\ protocol enables efficient WET and \\ WIT in multi-cluster IoT networks \\ using multiple IRSs. \\ \end{tabular} & Enhances energy harvesting and \\ \hline
[32] & IRS-assisted Wireless Networks & Enhanced secure communications &
\begin{tabular}{c} AN combines with IRS \\ beamforming to mitigate \\ eavesdropping when attackers \\ outnumber antennas. \\ \end{tabular} & Improves secrecy rate despite \\ \hline
[33] & IRS-assisted MISO Systems & Maximized secrecy rate & \
\begin{tabular}{c} An AO algorithm for transmit \\ covariance and IRS phase shift \\ improves secrecy performance. \\ \end{tabular} &
\begin{tabular}{c} Improves secrecy rate via closed \\ and semi-closed solutions \\ \end{tabular} \\ \hline
[34] & Cooperative NOMA Systems & Enhanced PLS &
\begin{tabular}{c} Analytical expressions for SOP and \\ secrecy capacity for AF and DF \\ protocols are derived. \\ \end{tabular} & Improves SOP and secrecy capacity \\ \hline
[35] & Cognitive Relay Networks & Secure cooperative transmission &
\begin{tabular}{c} Beamforming design protects \\ primary transmitters from \\ wiretapping by cognitive \\ eavesdroppers. \\ \end{tabular} & Enhances secure transmission for \\ \hline
[36] & RIS-aided Wireless Networks & Improved secrecy performance & \
\begin{tabular}{c} RIS deployed between source and \\ user boots link security against \\ eavesdroppers. \\ \end{tabular} &
\begin{tabular}{c} Enhances secrecy performance \\ despite eavesdropping \\ \end{tabular} \\ \hline
[37] & IRS-assisted MISO Networks & \begin{tabular}{c} Simultaneous transmission and \\ reflection for secrecy \\ \end{tabular} & \
\begin{tabular}{c} Simultaneous optimization of \\ beamforming and IRS reflection \\ coefficients uses energy and time \\ splitting for secrecy. \\ \end{tabular} &
\begin{tabular}{c} Enhances secrecy rate through \\ optimized IRS-assisted \\ transmission \\ \end{tabular} \\ \hline
[38] & IRS-aided Secure Networks & PLS enhancement &
\begin{tabular}{c} Derives SOP and secrecy rate using \\ stochastic geometry techniques. \\ \end{tabular} & Improves secrecy metrics derived \\ \hline
[41] & Uplink Wireless Networks & \
\begin{tabular}{c} Security enhancement via EH \\ jammers \\ \end{tabular} &
\begin{tabular}{c} An IRS and the EH jammer \\ collaborate to disrupt \\ eavesdropping on uplink. \\ \end{tabular} & Enhances uplink security with IRS \\ and jamming \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Related literature on IRS-assisted PLS.