The invention can prevent the passive signdevice as IC card to be unauthorized dispatched which is not aware of user to confirm the control of user on the sign.
The plan calls for a single sign-in each time a computer or phone is turned on, using a device such as a digital token, a smartcard, or a fingerprint reader.
Alone on the terrace in the darkness of night I groped all over like a blind man trying to find upon the black stone gate of death some device or sign.