In late 2018, Marriott hotel chain announced that one of its reservation systems had been compromised. Hundreds of millions of customer records, including credit card and passport numbers, were exfiltrated by the attackers. Marriott has not disclosed the full timeline or technical details of the assault. But what we do know tells us quite a bit about the current threat landscape and offers lessons for other enterprises on how to protect themselves. We answer 10 frequently asked questions: When was the Marriott breach? When did the breach happen?”]