Door lock security systems serve an important role in property protection, privacy, and general security. This comprehensive review examines several types of door lock security systems, including standard mechanical locks, electronic locks, and smart locks. It investigates their mechanisms, strengths and limitations, as well as technological developments. Furthermore, the study examines potential vulnerabilities and security concerns for each type of lock mechanism. It also investigates emerging trends in door lock security, such as biometric authentication and connection with smart home devices. This study seeks to provide insights for bettering the design and implementation of reliable security solutions for residential, commercial, and institutional contexts by analysing the effectiveness and limitations of various door lock security systems.