Authorities Closing In on Hackers Who Stole Data From JPMorgan Chase

It has become a familiar pattern: The computer system of a big American company is breached, the personal information of tens of millions of customers is stolen and a public outcry ensues. Rarely are the thieves caught.

But last summer’s attack on JPMorgan Chase — which resulted in hackers gaining access to email addresses and phone numbers for 83 million households and small businesses — may break that pattern of investigative dead ends in large corporate breaches.