JPMorgan Probes Possible Security Breach - Presented by: The Aol. On Network

JPMorgan Chase says it is working with federal authorities to probe a possible cyber attack. America's largest bank came short of admitting its systems were hacked, but did say it was taking additional steps to safeguard sensitive or confidential data, even though it was not seeing what it called unusual fraud activity. But sources close to the bank say malicious software was discovered on JPMorgan's network.

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