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In the Internet of Things (IoT) environment, more types of devices than ever before are connected to the internet to provide IoT services. Smart devices are becoming more intelligent and improving performance, but there are devices with little computing power and low storage capacity. Devices with limited resources will have difficulty applying existing public key cryptography systems to provide security. Therefore, communication protocols for various kinds of participating devices should bedoi:10.3390/s20185350 pmid:32961979 pmcid:PMC7570713 fatcat:qmiice64mje4zilgsqeogsxdry