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This Feb. 1, 2010, file photo, shows the Westin Philadelphia hotel in Philadelphia. The information of as many as 500 million guests at Starwood hotels has been compromised and Marriott said that it’s discovered that unauthorized access to data within its Starwood network has been taking place since 2014. The company said Friday, Nov. 30, 2018, that credit card numbers and expiration dates of some guests may have been taken. (AP Photo/Matt Rourke, File)
The Associated Press
Published: 30 November 2018

BETHESDA, Md. (AP) — A security breach inside Marriott's worldwide hotel empire has compromised the information of as many as 500 million guests, exposing in some cases credit card numbers, passport numbers and birthdates, the company said Friday.

Alarming security analysts, Marriott said that unauthorized access to data at the hotels, once run by Starwood, has been taking place since 2014.

It may be among the largest data breaches on record. Last year's startling Equifax hack affected more than 145 million people.

The affected hotel brands operated by Starwood before it was acquired by Marriott in 2016 include W Hotels, St. Regis, Sheraton, Westin, Element, Aloft, The Luxury Collection, Le Méridien and Four Points. Starwood branded timeshare properties are also included.

None of the Marriott-branded chains are threatened.

Credit card numbers and expiration dates of some guests may have been taken, according to the company. For as many as two-thirds of those affected, data exposed could include mailing address, phone number, email address, passport number, Starwood Preferred Guest account information, date of birth, gender, arrival and departure information, reservation date and communication preferences.

For some guests, the information was limited to name and sometimes other data such as mailing address, email address or other information.

"We fell short of what our guests deserve and what we expect of ourselves," CEO Arne Sorenson said in a prepared statement. "We are doing everything we can to support our guests, and using lessons learned to be better moving forward."

Email notifications for those who may have been affected begin rolling out Friday.

While the breach affected "approximately 500 million guests" who made a reservation at one of the affected hotels, some of those records could include a single person who booked multiple stays.
Asked for more details on the 500 million number, Marriott spokesman Jeff Flaherty said Friday that the company has not finished identifying duplicate information in the database.

When the merger was first announced in 2015, Starwood had 21 million people in its loyalty program.

The company manages more than 6,700 properties across the globe. Most are in North America.

While the first impulse for those potentially affected by the breach could be to check credit cards, security experts say other information in the database could be more damaging.

"The names, addresses, passport numbers and other sensitive personal information that was exposed is of greater concern than the payment info, which was encrypted," said analyst Ted Rossman of CreditCards.com. "People should be concerned that criminals could use this info to open fraudulent accounts in their names."

An internal security tool signaled a potential breach in early September, but the company was unable to decrypt the information that would define what data had potentially been exposed until last week.
Marriott, based in Bethesda, Maryland, said in a regulatory filing that it's premature to estimate what financial impact the data breach will have on the company. It noted that it does have cyber insurance, and is working with its insurance carriers to assess coverage.

The Starwood breach stands out among even the largest security hacks on record. Hilton had two separate data breaches that exposed more than 350,000 credit card numbers. One breach began in November 2014 and another in April 2015. Yahoo had a data breaches in 2013 and 2014 that impacted about 3 billion of its accounts. Target also had an incident in 2013 that affected more than 41 million customer payment card accounts and exposed contact information for more than 60 million customers.

The reaction to the breach was swift Friday.

The New York Attorney General opened an investigation. Virginia Sen. Mark Warner, co-founder of the Senate cybersecurity caucus and the top Democrat on the Senate intelligence committee, said that the U.S. needs laws that will limit the data companies can collect on its customers.

"It is past time we enact data security laws that ensure companies account for security costs rather than making their consumers shoulder the burden and harms resulting from these lapses," Warner said in a prepared statement.

Marriott has had a rocky process of merging its computer system with Starwood computers. Members of both loyalty programs have complained about missing points, glitches with stays crediting to their accounts and problems with free nights earned from credit cards not appearing.

Sorenson said that Marriott is still trying to phase out Starwood systems.

Marriott has set up a website and call center for anyone who thinks that they are at risk.

Shares of Marriott tumbled 5 percent at the opening bell.

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