Journal of Cybersecurity and Information Management JCIM 2690-6775 2769-7851 10.54216/JCIM https://www.americaspg.com/journals/show/19 2019 2019 Computer Science Department, Faculty of Computers and Information, Nahda University, Egypt Hosny. H. Abo Emira The Internet of Things (IoT) is increasingly an authenticity today. Nevertheless, some key challenges still need to be given care so that IoT solutions further support the rising demand for connected devices and the facilities offered. Outstanding to the possible significance and sensitivity of facilities, IoT solutions should address the security and privacy worries nearby these devices and the data they assemble, generate, and process. Recently, Blockchain technology has increased much attention in IoT solutions. Its principal usage conditions are in the financial domain, where Blockchain creates a capable application world and can be leveraged to explain security and privacy issues. However, this developing technology has a great possibility in the most various technological areas and can significantly help achieve the Internet of Things view in different features, increasing the measurements of decentralization, facilitating communications, allowing new transaction models, and allowing independent coordination of the devices. The paper's goal is to provide the ideas about the structure and operation of Blockchain and, typically, analyze how the use of this technology can be used to deliver security and privacy in IoT. 2020 2020 35 40 10.54216/JCIM.010202 https://www.americaspg.com/articleinfo/2/show/19