A Model on IoT Security Method and Protocols for IoT Security Layers Chandra Prakash and Rakesh Kumar Saini Abstract Internet of things (IoT) digitalized the worldwide system containing indi- viduals, connected things, smart devices, data, and information. It is a well-known fact that as an ever-increasing number of devices interface with the Internet, the difficulties of making sure about the information that transmitted and interchanges that they start are getting progressively significant. Throughout the years, we have seen a flood in IoT devices, comprehensively in two parts: homes and manufacturing. Since these are autonomous and secure fields, the duties of making sure about the devices rest with the platform providers. In this paper, we have discussed the various application areas where IoT is applied to get an effective and reliable outcome, and majorly, we have focused on security aspects related to IoT. For that purpose, we have proposed a security model to protect the IoT network or system from unwanted threats and attacks. The proposed model is providing a choice of a suitable secu- rity method and protocols for IoT Security layers. This model is used to improve the performance of IoT system by opting the appropriate security methods for IoT layers to reduce the power and time consumption. Keywords IoT applications · IoT security challenges · IoT communication protocols · IoT in manufacturing · IoT in healthcare 1 Introduction IoT can be defined as a systematic setup of interrelated computing devices, indi- viduals, connected things, advanced machines, data, and information that are given through unique identification and capable to send information over a system without direct interfering of human. A thing in the word IoT can be an individual with C. Prakash (B ) · R. K. Saini School of Computing, DIT University, Dehradun, Uttarakhand, India e-mail: chandra.thukral.19@gmail.com R. K. Saini e-mail: rakeshcool2008@gmail.com © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 N. Marriwala et al. (eds.), Mobile Radio Communications and 5G Networks, Lecture Notes in Networks and Systems 140, https://doi.org/10.1007/978-981-15-7130-5_63 771