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This design is a key with fingerprint sensor .There is an fingerprint sensor in the place when user touch the key . And there is an other sensor in the keyhole to receive the data from the key . When people use the key to open the door ,the sensor will judge whether this people live in this house. It means there are double locks .It is more security than the normal lock.And the color of Led light in the key will let you know whether the fingerprint lock is lock or open.
Guangdong University of Technology