The physical presence of a person is a unique.

Time difference (same time)
There is a 17 hours time difference between Tokyo and Santa Clara.
( Santa Clara, U.S.A 17 hours behind)

Time is necessary for the movement of the person.

Flight time
It takes 9 hours 15 minutes to fly from Tokyo to Santa Clara.

Abnormal detection (Santa Clara, U.S.A)
From 1:00 am, January 27, 2020 to 10:15 am, January 27, 2020
(arrival time)
Between these temporal information, the request of authentication
in Santa Clara is abnormal.

Control all devices and system in a location where the user is not present.