# SMS: A Secure Healthcare Model for Smart Cities
## 3 Related Works
The researchers in [38] proposed an IoT-driven system that collects information related to the patient's vital parameters like pulse, temperature, etc. They used an Intel Edison to provide multi-tasking capabilities and low power consumption. The authors in [11] presented the basics of edge computing including its definition and need. The authors further discussed the various cases where edge computing can bring significant outcomes. The concept of collaborative edge is also introduced. Lastly, the authors highlighted the different challenges and opportunities in the area of edge computing, paving the way for future research. A \"smart healthcare system\" based on \"edge computing\" is proposed in [17]. The proposed healthcare system uses a cognitive computing approach to monitor and manage the patient's health. The results show that the proposed approach improves the patient's survival rates in emergency situations. The authors in [18] proposed an algorithm to improve the medical QoS in EC-based healthcare systems. The authors further compared the performance of the proposed \"window-based rate control algorithm (w-RCA)\" with the traditional algorithm and showed that w-RCA gives improved results. The authors in [19] proposed a resource management system for a SHS based on EC. In the proposed work, the authors introduced a \"resource preservation net (RPN)\" for emergency departments. The RPN framework is integrated with edge and cloud computing and shows some significant improvements in the patient's waiting time and length of stay. In [17] and [20], the authors discussed the emergence and need of edge computing and its role in enhancing the services of CC and IoT. The researchers in [39] developed a framework for treatment and assessment of voice disorders using cloud and edge computing. Initially, edge computing was used to process the voice samples, which were then forwarded to a cloud for further processing. The authors used the \"Saarbrucken voice disorder database\" and achieved an accuracy of 98.5 percent. In [40], the authors presented a mechanism to show how the query results can be authenticated in edge computing. The proposed mechanism creates verification objects to authenticate the queries. The authors in [41] proposed a blockchain-based healthcare system that involves secured and the privacy-preserved interaction of all the participating entities of a healthcare ecosystem. Smart cities are a privileged environment for the adoption of ICT technologies to solve several problems. In [42], the authors address the adoption of big data and analytical treatment of data within a smart city, also presenting a prototype from which it was possible to conclude a set of methods used for analyzing smart healthcare data. In [43], the authors discuss how ICT can improve and impact the effectiveness of healthcare and reduce the costs of these services to citizens. In [44], the authors identify the type of technology used in a smart city regarding healthcare, the most important applications in this field, its degree of maturity, as well as the greatest barriers to its proliferation. Finally, the main benefits of smart health and future trends in this area are presented and discussed in [45]. _Research Gaps and Motivations_  
The work presented in Section 3 shows that in the last few years, several architectures, frameworks, and methods have been proposed and developed to provide secure and smart healthcare for the patients. However, in recent years, very few reliable and trustworthy frameworks have emerged that can effectively provide a holistically secured, privacy-preserved, cost-effective, smart, and energy-efficient approach for the healthcare ecosystems [46; 47; 48; 49; 50; 51; 52; 53; 54; 55]. Some existing solutions talk about securing the patient medical data, while others talk about effectively integrating different entities of the healthcare systems. In healthcare systems, especially with critical care units, real-time processing and decision-making is imperative [56; 57].