# Dynamic Group Management Scheme for Sustainable and Secure Information Sensing in IoT
## 5 Conclusions  
This paper provides the measurements to manage the dynamically allocated cluster headers and group securely by utilizing the four kinds of fundamental arithmetic operator, substitution operator, and logical operator. The proposed scheme supports mutual authentication and confidential information transmission in the dynamically allocated cluster headers and groups through authenticating group sensor nodes simultaneously and allocating the keys. Moreover, it can verify the distance between the sensor nodes by utilizing the distance bounding. It is secure to the various vulnerabilities resulting from the nature of wireless sensor network environment.  
The security provided by the proposed scheme not only provides logical security, but also physical security. The mutual authentication and e2e encryption communication offers confidentiality in communication in a logical way. If the proposed scheme is applied, actions can be taken against access by malicious users, infections by malicious codes, malicious updates of firmware and eavesdropping.  
The dynamic group authentication and the distance-bounding technique contained in the proposed scheme also provide people with physical security. If even one sensor does not participate in authentication, the dynamic group authentication would fail. This kind of security leads to the sensor's function, which detects theft or damage. The distance-bounding technique allows the sensor implementing the authentication to sense the geological existence, thereby providing similar physical security as in a dynamic group authentication.  
Also, it was confirmed that the proposed scheme had an insignificant difference in the energy consumption as compared with the existing routing protocols. The IoT environment will be the mesh network environment and the transfer of various kinds of information would happen on a sporadic basis. In addition, the cluster header will continue to transfer the information to servers for the analysis of information based on the cloud computing environment. Therefore, this could ultimately lead to service sustainability since both the demand for calculation at the cluster header and energy consumption is reduced. However, the calculation cannot be reduced for the quality in service. What is necessary is not reduction in energy consumption, but the efficient use of energy. The best routing protocol in terms of efficient energy use is the LEACH protocol. It can be said that the proposed scheme is more efficient than the LEACH protocol, which is the most efficient in energy consumption.  
From the abovementioned analysis results, it is believed that the proposed dynamic group management scheme can be utilized as a sustainable and secure sensor node management scheme for providing high-quality intelligent services in the IoT environment [18].  
**Author Contributions:** [PERSON] designed the proposed scheme; [PERSON] and [PERSON] researched related work; [PERSON] and [PERSON] performed and analyzed the scheme; [PERSON] and [PERSON] wrote the paper.  
**Conflicts of Interest:** The authors declare no conflict of interest.