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Started in Ancient Egypt with locks made completely out of wood. The key had extrusions that corresponded to the pins and holes within the lock that was bolted to the door. http://www.historyofkeys.com/locks-history/history-of-locks/
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Made completely of iron that could withstand stronger attacks. They also had keys that could be carried around in pockets. Only the right key could open a specific door with the creation of wards that blocked the wrong key from rotating completely. http://www.historyofkeys.com/locks-history/history-of-locks/
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Was modifying existing locks to have a more complex key,several keys and extravagant decorations around a keyhole to confuse lock pickers. They became hidden as they were in a time of war. http://www.historyofkeys.com/locks-history/history-of-locks/
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Started a chain of lock improvements after the 18th century, Robert Barronin created a double-acting tumbler lock. Keys would have certain codes to cut out precise bits so that it http://www.historyofkeys.com/locks-history/history-of-locks/ https://enlightenme.com/lever-lock/
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This lock was created by Joseph Brahmah and was very diffucult to pick for several years. It uses "wafers" instead of pins. Wafers are precise indentations made in a cylinder that correspond with extrusions that jut out from a very cylindrical key. http://crypto.com/photos/misc/bramah/
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This lock jams the wrong key or lockpicking tools within the lock until the real key or a reset key overrides it. It was created by Jeremiah Chubb.
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This lock is created by Yale Sr.and is used commonly because it is very similar to the original Egyptian design. It made it easier to take out a key and insert it again, it also can utilize different locking methods mentioned before like the pin tumbler, disk turner, and wafer tumbler lock. http://www.historyofkeys.com/locks-history/history-of-locks/
http://www.explainthatstuff.com/yalelock.html -
Linus Yale used both his fathers and James Sargent's lock to create the modern day combination lock used in lockers at schools or gyms.
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Tor Sornes patented the first electronic keycard lock that has a CPU unit within the lock that sends a charge to the a mechanism that opens the bolt. This opened the way to many new modern variations we have today. http://gizmodo.com/the-history-and-future-of-locks-and-keys-1735694812
