Luck Played Role in Discovery of Data Breach at JPMorgan Affecting Millions

Matthew Goldstein and Nicole Perlroth report:

When it comes to defending a large company against an online attack, sometimes luck and timing can mean as much as spending hundreds of millions of dollars a year on computer security.

The broad attack this summer on JPMorgan Chase, which compromised information for 76 million households and seven million small businesses, took the bank’s security team more than two months to detect before it was stopped.

But the intrusion at the nation’s largest bank could have gone on for longer if not for a critical discovery by a Milwaukee security consulting firm that helped JPMorgan uncover the full extent of its breach.

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