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Epsilon: Major Banks, Merchant Accounts Impacted by Company Hack

  
  
  
  

Guest blogger: Tracy Kitten, Managing Editor, Bankinfosecurity

The list of banking institutions and merchant accounts affected by the Epsilon e-mail breach continues to grow.

So far, Citi, Chase, U.S. Bank, Capitol One, Barclays Bank of Delaware, Verizon, Walgreens, Visa, Kroger, Marriott International, Ritz-Carlton Rewards, Brookstone, New York & Co., TiVo, HSN and L.L. Bean are among the confirmed entities to be hit by what some observers say could be one of the biggest data breaches to date.epsilon breach

Epsilon, an online marketing unit of Alliance Data Systems Corp., announced on April 1 that an outside intrusion had hacked into some of its customer files. Epsilon sends e-mail campaigns and offers to consumers who register for a company's website or who give their e-mail addresses while shopping. Epsilon sends more than 40 billion e-mails annually and also runs loyalty programs for Citi and Chase credit card processing  users. Epsilon's databases house consumer information cybercriminals could use for targeted phishing, better known as spear phishing, attacks.

In a brief statement, Epsilon says it detected a breach on March 30 during which "clients' customer credit card processing data were exposed by an unauthorized entry into Epsilon's e-mail system."

Subsequently, Chase and U.S. Bank both issued statements last week telling customers they should be wary of phishy e-mails.

'Biggest Breach We Have Ever Seen'

Epsilon says it does not suspect any financial information has been compromised. But it's likely just a matter of time before personal and financial information is exploited, says Neil Schwartzman, founder and chief security specialist at Montreal-based CASL Consulting.
It is the biggest breach we have ever seen," Schwartzman says. "And to say no financial information has been stolen is, well, understating the massive breach and concern."

To date, the largest known incident is the Heartland Payment Systems data breach, which impacted an estimated 130 million credit cards.

Though still too early to confirm the depth and breadth of the Epsilon breach, Schwartzman says he expects the list of affected companies and institutions to continue to grow. He also says Epsilon should be held to the flames for not adequately protecting sensitive consumer information. "Some of the most fundamental steps of protecting consumer data were not taken here," he says.

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