Chapter 13 - 01 - Understand IoT Devices, Application Areas, and Communication Models - 05_ocred_fax_ocred.pdf

Certified Cybersecurity Technician Exam 212-82 10T and OT Security IoT Comm...

Certified Cybersecurity Technician Exam 212-82 10T and OT Security IoT Communication Models m Device-To-Device Model m Device-To-Cloud Model P S Application Q PRI oy R >.............. Service Provider... [ ] I‘ v wre v coAar U 7 Light Bulb from Wireless Network Light Switch from H Ml v ons é manufacturer A manufacturer B v Tee e ¥ Bluetooth Device with ? P Device with : :‘wb:" Temperature Carb:‘rli l\::lvwllde Igbee Sensor Sensor n N (fl L, 4| Device-to-Gateway Model Cloud-to-Cloud (Back-End Data-Sharing Model) Application Protocol Stack v HTTP Service Provider v CoAp CoAP Application S v s.,y DTS - o , Service Provider2......... I IPva/IPvE _ Yy 9 —l.| " tep ¥ v upp '9' ‘HTTP’ Application " "yrTes L] v IPvé w\% v IPv6 é Service Provider#1 Oauth 2.0 : Local Gateway Ush Y., JSON ; ight T?.‘::::m“t"ut?e................ e e s ] Device with Sensor "oy Application v Bluetooth smart Carbon Monoxide Service Provider #13 Sensor v IEEE 802.11 (Wi-Fi) sensor v IEEE 802.15.4 (LR-WPAN) Copyright © by IC-C il Al Rights Reserved. ReproductionIs Strictly Prohibited IoT Communication Models loT technology uses various technical communication models, each with its own characteristics. These models highlight the flexibility with which 10T devices can communicate with each other or with the client. Discussed below are four communication models and the key characteristics associated with each model: Device-to-Device Communication Model In this type of communication, inter-connected devices interact with each other through the Internet, but they predominantly use protocols such as ZigBee, Z-Wave or Bluetooth. Device-to-device communication is most commonly used in smart home devices such as thermostats, light bulbs, door locks, CCTV cameras, and fridges, which transfer small data packets to each other at a low data rate. This model is also popular in communication between wearable devices. For example, an ECG/EKG device attached to the body of a patient will be paired to his/her smartphone and will send him/her notifications during an emergency..........____’ o I _\Q/_ 4....................;@.4....... O Light Bulb from Wireless Network Light Switch from manufacturer A manufacturer B v’ Bluetooth v’ Z-wave v Zigbee Figure 13.4: 10T device-to-device communication model Module 13 Page 1571 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 loT and OT Security Device-to-Cloud Communication Model In this type of communication, devices communicate with the cloud directly, rather than directly communicating with the client to send or receive data or commands. It uses communication protocols such as Wi-Fi or Ethernet, and sometimes uses Cellular as well. An example of Wi-Fi-based device-to-cloud communication is a CCTV camera that can be accessed on a smartphone from a remote location. In this scenario, the device (here, the CCTV camera) cannot directly communicate with the client; rather, it first sends data to the cloud, and then, if the client inputs the correct credentials, he/she is then allowed to access the cloud, which in turn allows him/her to access the device at his/her home. - Application L.ee=**""" Service Provider v CoAP T (F 4" HTTP vv TLS v DTLS é = v TCP v' UDP v v Device with o IP.. Temperature Device with P Carbon Monoxide Sensor Sensor Figure 13.5: 10T device-to-cloud communication model Device-to-Gateway Communication Model In the device-to-gateway communication model, the 10T device communicates with an intermediate device called a gateway, which in turn communicates with the cloud service. This gateway device could be a smartphone or a hub that is acting as an intermediate point, which also provides security features and data or protocol translation. The protocols generally used in this mode of communication are ZigBee and Z-Wave. If the application layer gateway is a smartphone, then it might take the form of an app that interacts with the 10T device and with the cloud. This device might be a smart TV that connects to the cloud service through a mobile phone app. Module 13 Page 1572 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 loT and OT Security Application y v’ HTTP Service Provider CoAP VTS L. A