The attack is possible thanks to a DC jack on the underside of the lock that's used to reprogram the doors.

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Though he demonstrated the remote attack with a Wifi-connected laptop on stage, Jack declined to reveal many of the technical details of that exploit.

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When Millwall pressed for an equaliser, Ipswich were also effective on the counter-attack: they launched a swift move following a wayward Henry corner, Jack Colback eventually shooting wide from just inside the penalty area.

BBC: Sport - Football - Ipswich 2-0 Millwall