This entry discusses the legal ramifications of IoT deployment. Since the aim of IoT is to make our lives easier and more efficient, IoT devices collect massive amounts of data, as they are strongly connected to big data, machine learning, artificial intelligence, and others. This allows systems to communicate, analyze, recognize, make decisions, and automate procedures without any human intervention. Nonetheless, challenges will always accompany good things. IoT device’s gathering of data could be abused or exploited, as the network overall could be subject to widespread cyber security attacks and invasions of privacy, which may force the user to sacrifice their data to use the IoT devices. The researcher peruses to analyze the essence of IoT, its types, structure, levels, and regulatory basis. The researcher aims to clarify the IoT deployment challenges related to privacy and cybersecurity provided by recent lawsuits. The researcher investigates the compliance of IoT with the GDPR standards by understanding the challenges of IoT to the GDPR requirements, as well as the compliance of IoT with the EU’s AI Act.