1
Table A1: Matrix of Observation Corridors and PIN Protection Method
Observation Corridors
Method Cashier
Customers
in Queue
Customers
Elsewhere
On-Site
Cameras
Remote
Cameras
PED Stand A
M
H
L
L
L
PED Stand B
H
H
H
L
M
Check-Stand
A
L M M L H
Check-Stand
B
H H M H H
Customer
Instruction
H* H* H* H* H*
Customer Instruction methods are less repeatable and therefore should be used in combination with
other methods.
L
= low,
M
= medium,
H
= high.
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