# A Survey on Emerging Blockchain Technology Platforms for Securing the Internet of Things
## 3 Blockchain Platforms  
Six distributed ledger/blockchain platforms found to be the most used technology for enhancing security in the Internet of Things (IoT) were analysed in this work, following a thorough assessment of 146 studies. Figure 5 depicts the extent of their usage across the entirety of the works that were reviewed.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**S/N** & **Work** & **Reviewed Work Count** & **Focus** & **Limitation** & **Recommendation** \\ \hline
8. & [25] & 20 & \begin{tabular}{c} Security and privacy issues and challenges in IoT-BC Integration. \\ \end{tabular} & \
\begin{tabular}{c} Lacks detailed explanation on how the security and privacy are achieved \\ \end{tabular} &
\begin{tabular}{c} Future work can discuss \\ in depth how to achieve \\ privacy and security in \\ IoT-BC \\ \end{tabular} \\ \hline
9. & [23] & 7 & IoT-BC application & Nothing on security & Not provided \\ \hline
10. & [37] & 37 & \begin{tabular}{c} IoT challenges and performance of IoT-BC solutions \\ \end{tabular} & \
\begin{tabular}{c} Security components in IoT-BC not covered \\ \end{tabular} &
\begin{tabular}{c} Proposes adopting dew \\ and cloudlet layer \\ architecture for IoT-BC \\ \end{tabular} \\ \hline
11. & [33] & 81 & \begin{tabular}{c} Issues and trends in IoT-Blockchain security \\ perspective \\ \end{tabular} & \
\begin{tabular}{c} Focus on IoT security works using BC from 2017 \\ to 2021 \\ \end{tabular} &
\begin{tabular}{c} Explores how BC, edge \\ computing, and IoT \\ integration can improve \\ security \\ \end{tabular} \\ \hline
12. & [27] & 10 & \begin{tabular}{c} Brief review of selected \\ IoT applications and \\ IoT-BC use-cases \\ \end{tabular} & \
\begin{tabular}{c} Unable to identify a most \\ efficient platform for low \\ resource device \\ \end{tabular} &
\begin{tabular}{c} To develop an architecture \\ suitable for all IoT devices \\ irrespective of their size \\ \end{tabular} \\ \hline
13. & [26] & N/A & \begin{tabular}{c} Architecture, consensus, \\ and traffic modelling \\ \end{tabular} & \
\begin{tabular}{c} Security and platform \\ choice \\ \end{tabular} &
\begin{tabular}{c} Security, regulation, and \\ policy development \\ should be addressed for \\ IoT-BC \\ \end{tabular} \\ \hline
14. & [28] & 15 & \begin{tabular}{c} Summary of works on IoT \\ challenges and BC \\ applications to IoT \\ \end{tabular} & \
\begin{tabular}{c} Security perspective of \\ IoT-BC not covered \\ \end{tabular} &
\begin{tabular}{c} None \\ \end{tabular} \\ \hline
15. & [38] & 100 & \begin{tabular}{c} Paper review and \\ Hyperledger Saw-tooth \\ for Industrial IoT \\ \end{tabular} & \
\begin{tabular}{c} Regulatory and \\ compliance for IoT-BC not \\ addressed \\ \end{tabular} &
\begin{tabular}{c} Cross-chain for IoT-BC, \\ industrial standardization, \\ distributed preservation, \\ and privacy issues \\ \end{tabular} \\ \hline
16. & This & 61 & \begin{tabular}{c} IoT-BC Platform and \\ Security components \\ \end{tabular} & \
\begin{tabular}{c} Limited to works from \\ 2020 to 2024 \\ \end{tabular} &
\begin{tabular}{c} Improvement on security \\ component in IoT-BC \\ integration \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table}
Table 1: _Cont._  
Figure 5: Blockchain platform used in research papers covered in this study.