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'Padlock Hard' is external hard drive, the numeric locking device which is analog security type is added at the USB port of the external hard drive besides the security software. You should know the PIN of the external locking device to release the locking of the USB port and use. Without knowing the PIN, the USB port cannot be opened and it is impossible to connect to the computer.
IDAS, Hongik University
Seoul, South Korea
Jee Na Jun,
IDAS, Hongik University
Dae Kwan Park,
Graduate School of Design, Kookmin University