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BT range can be extended to 100 meters easily. No physical access is needed. An extension of ransomware.
There is a reason many retailers have a camera on the till operator. I did install retail "security" for a while. Chain / franchises have a bigger problem than a locally owned shop as often there is no local management, just some of the operators are also supervisors. So I'm sceptical, but it's a misuse of technology even it is effective. All DRM is.
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