Nov. 30, 2018 / 5:44 AM CST / Updated 6:35 AM CST
By Erik Ortiz
Marriott International said Friday that up to 500 million guests' information may have been accessed as part of a breach of its Starwood guest reservation database, potentially one of the largest breaches of consumer data ever.
The world's largest hotel chain said it first received an alert in September from an internal security tool of an attempt to access the database. As part of an investigation, the company discovered there had been unauthorized access since 2014 and that an "unauthorized party" had copied and encrypted information.