Figure 3 (IMAGE)

Pohang University of Science & Technology (POSTECH)

Figure 3

Caption

Schematic diagram two-level security platform. When the QR code that appears as a reflection image is scanned with a smart phone, the first password is distributed to the user. This password information provides the voltage value that is translated to the user. This voltage value is applied to the device a secondary password in the form of a hologram is provided to the user.

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POSTECH

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