This document presents a literature review focused on the security and privacy aspects of the Internet of Things (IoT). It begins by introducing IoT and its applications across various industries, highlighting the associated security and privacy concerns. The review covers relevant technologies and applications, such as smart healthcare systems and smart city applications, while also identifying challenges like cryptanalysis attacks, malware attacks, and data breaches. It discusses existing literature on security techniques, including cryptography and access control, and points out gaps in research, such as the limited exploration of emerging technologies like cloud computing and artificial intelligence in IoT security. The review concludes by suggesting future research directions, emphasizing the need to address these gaps to enhance IoT security and privacy.