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In this article we aim to make an analysis of the evolution of security systems for smart homes and to present some effective solutions. Manufacturers are not developing smart devices from scratch, but are using existing solutions launched by large IT companies to help build smart home networks. The sensors are integrated in different places in homes, offices, equipment, sometimes even clothes, to detect and monitor the location, actions, necessary signs, room temperature and humidity levels of users properties. However, ensuring confidentiality and effective security is a major challenge for smart homes. The increased risk of data security and information leakage makes smart home security an important challenge that needs to be carefully considered.