Ancient door locks safeguard dwellings and valuables, featuring diverse types like bolt locks and deadbolts. Crafted from durable metals like steel, iron, or brass, locks consist of keyholes used in conjunction with keys, ensuring only authorized individuals can open them. Lockpicking techniques present security concerns, necessitating the development of advanced measures such as biometric and RFID locks. Throughout history, inventors like Linus Yale Jr. have revolutionized lock design, while organizations like ALOA and locksmith professionals play vital roles in ensuring lock security.