Home Depot may be the latest retailer to have suffered a massive credit card breach, with the company moving to assuage consumers' fears after a large cache of stolen data reportedly appeared on black market sites.

According to information first reported by Krebs on Security on Tuesday, the breach may have extended as far back as the spring of this year. If so, the fallout may end up being far larger than Target's incident late last year, when personal data pertaining to tens of millions of customers was compromised.



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Home Depot is working with investigators to determine the origin of "unusual activity," a spokeswoman said in a statement.

"Protecting our customers' information is something we take extremely seriously, and we are aggressively gathering facts at this point while working to protect customers," she added, but declined to provide further information.



The home improvement chain sought to assure customers that their banks and Home Depot itself would help make shoppers whole in the event fraudulent charges were discovered.

"If we confirm a breach, we will offer free identity protection services, including credit monitoring, to any potentially impacted customers, the company said in a statement, incentives that Target also offered to consumers affected by its data theft last fall.

"We're working hard to get you the information you need as quickly as possible and will continue to provide updates as we learn more," Home Depot added.

Amid a rash of identity thefts that have laid claim to banks and retailers in recent months, Krebs on Security reported that the breach bore similar hallmarks to groups that hit P.F. Chang's, as well as Target and others. Krebs added that the breach may have taken place across all of Home Depot's U.S. stores.

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Privately, according to reports, officials suspect the hackers are of either Russian or Ukrainian origin. Hackers from those countries are also widely suspected as having orchestrated a recent attack on the Nasdaq Stock Market.