'Hackers are always fighting for that 0.0001% weakness,' Kim said. It's true, Kim said, that casino giants like MGM Resorts and Caesars are protected by sophisticated - and expensive - security operations. 'When people think about security, they are thinking about the really big super-computers, firewalls, a lot of security systems,' said Yoohwan Kim, a computer science professor at the University of Nevada, Las Vegas, whose expertise includes network security. The security attacks that triggered an FBI probe shatter a public perception that casino security requires an 'Oceans 11'-level effort to defeat it.

The casino giant said its casino and hotel computer operations weren't disrupted but couldn't say with certainty that personal information about tens of millions of its customers was secure following the data breach. Brian Ahern, a company spokesperson, declined Friday to answer questions from The Associated Press, including what information had been compromised in the breach.īy Thursday, Caesars Entertainment - the largest casino owner in the world - confirmed it, too, had been hit by a cybersecurity attack. The situation entered its sixth day on Friday, with booking capabilities still down and MGM Resorts offering penalty-free room cancelations through Sept. Others said they were cancelling their trips this weekend. Some customers said their hotel room cards weren't working. Videos on social media showed video slot machines that had gone dark. MGM Resorts said the incident began Sunday, affecting reservations and casino floors in Las Vegas and other states. 'It's been kind of an issue for me,' she said, 'but I'm now monitoring my credit, and now I'm taking these extra steps.' Unsettled by the thought of what other information the hackers may have stolen, Martinez, a publicist from Los Angeles, said she signed up for a credit report monitoring program, which will cost her US$20 monthly. Now she was being greeted by four new transactions she did not recognize - charges that she said increased with each transaction, from US$9.99 to US$46. Martinez, 45, immediately checked her bank statements for the credit card linked to her loyalty account. Top business headlines, all in one place.There, she learned that the largest casino owner in Las Vegas had fallen victim to a cybersecurity breach. That's odd, she thought, then toggled over to Facebook to search for clues about the issue on a group for MGM Resorts International loyalty members. A persistent error message greeted Dulce Martinez on Monday as she tried to access her casino rewards account to book accommodations for an upcoming business trip.

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