Marriott Says 5 Million Unencrypted Passport Numbers Part of Breach

Marriott Says 5 Million Unencrypted Passport Numbers Part of Breach

The roughly 383 million customer files is the "upper limit" of the total number of records involved in the breach, Marriott said.

Anyone who believes their personal information to have been involved in the data theft is advised to visit Marriott's support site.

Global hotel chain Marriott believes that more than five million unencrypted passport numbers were included among the data breach that came to light in November previous year.

This number could fall further when factoring in duplicate records, Marriott said.

The company says it is in the process of setting up a method for guests to look up whether a passport number has been compromised.

The hotel chain today released findings from the ongoing investigation into the hack, which was initially thought to have affected the records of up to 500 million customers.

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After consulting internal and external investigators, the world's largest lodging company now believes that no more than 383 million customers - and probably fewer - had their data exposed to unauthorized parties, Marriott said Friday in a statement. It is still investigating how many stolen payment card numbers were not encrypted.

The company also provided new details, saying the breach exposed about 5.3 million unencrypted passport numbers, 20 million encrypted passport numbers and 8.6 million encrypted payment cards.

In its initial disclosure in November, Marriott said that although the payment card data stolen was encrypted, it was possible that the attackers had accessed the key material needed to decrypt them. The Starwood division, which includes hotel lines like Sheraton, W Hotels, Westin, Le Meridien, Four Points by Sheraton, Aloft and St. Regis, had been hacked since 2014, Marriott said. They go on to say that there is no evidence that the third-parties had access to the key to decrypt these payment cards.

Fox Business foreign policy analyst Walid Phares and former National Security Council chief of staff Fred Fleitz discuss how Secretary of State Mike Pompeo confirmed that China was behind the massive security breach in Marriott's guest system. "The company has concluded with a fair degree of certainty that information for fewer than 383 million unique guests was involved, although the company is not able to quantify that lower number because of the nature of the data in the database", the company said.

"With the completion of the reservation systems conversion undertaken as part of the company's post-merger integration work, all reservations are now running through the Marriott system".

Guests from countries and regions listed on the site have the opportunity to enroll in web monitoring services free of charge for one year.

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