Melbourne's Crown Casino says it's confident of recovering much of the $32 million it lost in a scam involving a high roller and the hacking of its surveillance system.
In what's been likened to an Ocean's 11-style operation, Crown's security camera system was used to spy for a foreign high roller over eight hands of cards and the gambler was given signals on how to bet.
A Crown spokesman said the casino was investigating the rort.
"Crown's surveillance department recently reported concerns over a sophisticated betting scam," he said.
"A Crown investigation is under way and is ongoing."
The spokesman said the casino was confident of recovering a significant portion of the money stolen.
A Victoria Police spokeswoman said an official complaint had not been made but police had been briefed on the situation.
Casino security consultant Baron Stringfellow said it would be simple to intercept some casino surveillance systems.
"It's very easy to intercept the signal from many casinos that don't take precautions," he told ABC radio.
"The problem with casinos is that they think they're unbeatable but we see over and over again that they're not."
Mr Stringfellow said the person who was fed the security camera images would have had a wireless microphone that transmitted to a tiny wireless earpiece worn by the high roller.
"It's virtually invisible if you cover it with a bit of your own hair."He said $32 million was a mid-level sting in a commercial casino the size of Crown.
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