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7 On Your Side digs for answers after massive data breach at Marriott's Starwood hotels

FILE - This Monday, April, 28, 2014, file photo, shows a Marriott hotel in Cranberry Township, Pa. Marriott International announced Monday, Nov. 16, 2015, it is buying rival hotel chain Starwood for $12.2 billion in a deal that will secure its position as the world's largest hotelier. (AP Photo/Gene J. Puskar, File)

Do hackers have your credit information?

Up to 500 million Marriott Hotel customers face that possibility after the company admitted hackers broke into its system.

Marriott Hotel chain says it is “unable to determine” yet whether their AES-128 system was compromised. This system stores the encryption keys, which, if stolen, can give hackers the ability to match credit card information with customers.

"If the attackers were able to somehow gain access to the keys that are stored within the same network to associate that same encrypted database and be able to decrypt it, than that credit card information would be revealed to all the bad guys," said Adam Kujawa, director of Malwarebytes Labs.

Starwood Hotel chain was also hacked by malware in 2015 before it was bought by Marriott.

Unlike Equifax's controversial move to initially force customers to sign away their rights to sue when accepting free credit monitoring - there is no evidence Marriott is making that same condition.

7 On Your Side checked by going through the sign up process.

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