## 2 Literature Survey
### Related Work
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**References** & **IoT Levels** & **Affected** & **Implications** & **Propose** & **Blockchain** \\  & & **Layers** & & **Solutions** & **Used** \\ \hline D, [PERSON], [PERSON] [13] & Intermediate level & Network layer & Privacy violation & Permissioned blockchain has been & \\  & & level & & & & \\  & & level & & & & \\ \hline \multirow{3}{*}{[PERSON] et al. [16]} & Intermediate level & Adaptation layer, network layer & Disruption and denial-of-service & & & \\  & & & & & \\  & & & & & \\ \hline \multirow{3}{*}{[PERSON] et al. [19]} & \multirow{3}{*}{Low level} & 6 LoWPAN & \multirow{3}{*}{Privacy violation} & Numerous performances have been & \\  & & adaptation layer, and network layer & & & & \\  & & layer & & & & \\  & & layer & & & & \\ \hline \multirow{3}{*}{[PERSON] et al. [20]} & \multirow{3}{*}{Low level} & \multirow{3}{*}{Network layer} & Disruption and denial-of-service & & & \\  & & denial-of-service & & & \\  & & & denial-of-service & & & \\ \hline \multirow{3}{*}{[PERSON] et al. [22]} & \multirow{3}{*}{Low level} & Adaptation layer, network layer & Privacy violation and denial-of-service & & & \\  & & & & & \\  & & & & & \\ \hline \multirow{3}{*}{[PERSON] al. [26]} & \multirow{3}{*}{Low level} & \multirow{3}{*}{Network layer} & \multirow{3}{*}{Privacy violation} & Modum io, a start-up that uses IoT sensor & \\  & & & sensors to exploit blockchain technologies & & \\  & & & to claim temperature record data & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \hline \multirow{3}{*}{[PERSON] [27]} & High level, Intermediate level & Adaptation layer, and network layer & Privacy violation and denial-of-service & An idea was presented to incorporate IoT & \\  & & & layer, and network & denial-of-service & & \\  & & layer & & & \\ \hline \multirow{3}{*}{[PERSON] [28]} & \multirow{3}{*}{Intermediate level} & Application layer, and network layer & Privacy violation & The study findings will lead to the creation & \\  & & & network layer & & \\ \hline \multirow{3}{*}{[PERSON] et al. [29]} & Intermediate level & Application layer, and network layer & Disruption and denial-of-service & A novel approach to simulating an IoT & \\  & & & network layer & & ecosystem was suggested. & \\ \hline \multirow{3}{*}{[PERSON] et al. [30]} & High level, Intermediate level & Adaptation layer, and network layer & Privacy violation & Its specific mechanisms help establish data confidentiality, integrity, and privacy. & Private Blockchain \\ \hline \multirow{3}{*}{[PERSON] et al. [31]} & Intermediate level & Adaptation layer, and network layer & Privacy violation and denial-of-service & A security scheme based on RSA and ECC & \\  & & & and network layer & & for IoT data has been proposed that used & \\  & & & layer & denial-of-service & RSA security blocks to promote the & \\  & & & security level. & & \\ \hline \multirow{3}{*}{[PERSON] et al. [32]} & High level, Intermediate level & Application layer, and network layer & Privacy violation and denial-of-service & RSA is used to enhance cryptography and privacy process & Hybrid Blockchain \\ \hline \multirow{3}{*}{[PERSON] et al. [33]} & Intermediate level & Network layer & Privacy violation and denial-of-service & The blockchain data flow is then linked to the IoT technology deployment based on the number of traceable resource units. & Hybrid Blockchain \\ \hline \multirow{3}{*}{[PERSON] et al. [34]} & Intermediate level & Adaptation layer, and network layer & Disruption and denial-of-service & A consensus virtualization technique of & \\  & & & layer & denial-of-service & \\  & & & layer & denial-of-service & \\ \hline \end{tabular}
\end{table} 
Table 1: Comparative analysis of BIoT technologies. Moreover, Table 1 categorizes recent studies which investigated the integration of blockchain with the IoT which can help researchers to track recent studies and publications that adopted a blockchain with the IoT in a certain domain.