How much? That's a lot of alerts!
So why didn't anyone do anything about Neiman Marcus's alarms? Why were credit cards still stolen?
"The hackers moved unnoticed in the company’s computers for more than eight months, sometimes tripping hundreds of alerts daily because their card-stealing software was deleted automatically each day from the Dallas-based retailer’s payment registers and had to be constantly reloaded. Card data were taken from July through October.
... Ginger Reeder, a spokeswoman for Neiman Marcus, says the hackers were sophisticated, giving their software a name nearly identical to the company’s payment software, so any alerts would go unnoticed amid the deluge of data routinely reviewed by the company’s security team."
But how did these hackers get into the system in the first place? Bloomberg Businessweek has more about this crazy story.