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Hospitality giant Marriott today disclosed a massive data breach exposing the personal and financial information on as many as a half billion customers who made reservations at any of its Starwood properties over the past four years.

Marriott said the breach involved unauthorized access to a database containing guest information tied to reservations made at Starwood properties on or before Sept. 10, 2018, and that its ongoing investigation suggests the perpetrators had been inside the company’s networks since 2014.

Marriott said the intruders encrypted information from the hacked database (likely to avoid detection by any data-loss prevention tools when

This post first appeared on Krebs On Security. click here for original article.

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