###### Abstract
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Year** & **Reference** & **S** & **I** & **G** & **O** & **Focuses** \\ \hline
2010 & [PERSON] et al. [1] & \(\surd\) & \(\surd\) & \(\surd\) & Data integrity and privacy issues specifically on wireless technologies: RFID and WSN \\ \cline{2-6}  & [PERSON] [2] & & & & \(\surd\) & Limited to address data and privacy legislation of the IoT and RFID \\ \hline
2012 & [PERSON] et al. [3] & \(\surd\) & \(\surd\) & \(\surd\) & A general overview of data confidentiality, privacy and trust specifically on distributed intelligence, communication and identification technologies \\ \hline
2013 & [PERSON] and [PERSON] [4] & & \(\surd\) & \(\surd\) & A brief discussion of security attacks and measurements based on three-layer IoT architecture (perception layer, transport layer and application layer) \\ \hline
2014 & [PERSON] et al. [5] & & & \(\surd\) & A general overview of IoT privacy threats and challenges \\ \cline{2-6}  & [PERSON] et al. [6] & & \(\surd\) & \(\surd\) & Analyze the cross-layer heterogenous and security issues of three-layer IoT architecture (Perception layer, transport layer and application layer) and focuses specifically on WSN and RFID \\ \hline
2015 & Fremantle and [PERSON] [7] & \(\surd\) & \(\surd\) & Middleware systems and their security properties, as well as a very brief discussion on future works \\ \cline{2-6}  & [PERSON] et al. [8] & & \(\surd\) & \(\surd\) & IoT communication protocols and technologies specifically on MAC and Physical layers \\ \cline{2-6}  & [PERSON] et al. [9] & \(\surd\) & & \(\surd\) & IoT security protocols and key distribution specifically on WSN \\ \hline
2016 & [PERSON] et al. [10] & \(\surd\) & \(\surd\) & \(\surd\) & Secure routing protocols and trust models \\ \cline{2-6}  & [PERSON] et al. [11] & \(\surd\) & & \(\surd\) & Review IoT from a data-centric perspective, specifically on RFID \\ \hline
2017 & [PERSON] et al. [12] & \(\surd\) & \(\surd\) & \(\surd\) & Comprehensive security analysis on consumer IoT Devices \\ \hline
2018 & [PERSON] & & & & & \\ et al. [13] & & \(\surd\) & \(\surd\) & Blockchain-based IoT application \\ \hline
2019 & [PERSON] et al. [14] & \(\surd\) & & \(\surd\) & Studies on the relationship between IoT application and related technologies: blockchain, machine learning, fog and cloud computing \\ \cline{2-6}  & [PERSON] et al. [15] & \(\surd\) & & \(\surd\) & Security analysis of IoT programming platforms \\ \cline{2-6}  & [PERSON] and & & & \(\surd\) & Design-level and code-level security analysis on IoT devices \\ \cline{2-6}  & [PERSON] [16] & & & \(\surd\) & Comparative analysis on the relationship of IoT security, deep learning and big data technologies \\ \hline
2020 & [PERSON] et al. [17] & \(\surd\) & \(\surd\) & \(\surd\) & A review on blockchain-based IoT architecture \\ \cline{2-6}  & [PERSON] et al. [18] & \(\surd\) & \(\surd\) & \(\surd\) & A general review on threat models and attack path of IoT \\ \hline
2021 & [PERSON] et al. [20] & \(\surd\) & \(\surd\) & & Software attacks targeting hardware vulnerabilities and deep learning detection mechanisms in IoT \\ \cline{2-6}  & [PERSON] et al. [21] & & \(\surd\) & \(\surd\) & A general IoT technologies review on Portugal’s Agro-Industry \\ \cline{2-6}  & [PERSON] et al. [22] & & & \(\surd\) & Relations between machine learning and blockchain in IIoT \\ \cline{2-6}  & [PERSON] et al. [23] & \(\surd\) & & \(\surd\) & A general review on blockchain-based decentralized IIoT security \\ \hline \hline \end{tabular} Legend: S = security requirements, I = industry countermeasure, G = gap analysis, O = ongoing challenges and future works.  
\end{table} 
Table 1: Chronological summary of previous surveys in the IoT and IIoT security. security issues, and corresponding solutions. After that, the discussion of IoT security is nailed down on the specific technologies and scope. The study of Frematle and [PERSON] [7] focuses the analysis on the middleware of IoT security. [PERSON] et al.