In recent years, the Internet of Things has become urgent in our lives, as it is used in many areas to facilitate business and daily life. But unfortunately, there are concerns due to security and safety issues. Therefore, many researchers have turned their attention to identifying the best solutions for increasing security and raising privacy one of which is the usage of Blockchain in the Internet of Things. This paper presents the benefits of applying Blockchain technology to the Internet of

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... hings, the challenges faced and the most up-to-date components that satisfy the Component-Based Development (CBD) principles to enhance security and privacy.