Security company ArcSight has retooled one of their event-monitoring products and created an appliance designed to detect fraudulent bank and brokerage transactions.

ArcSight found that customers who were using its Enterprise Security Manager (ESM) product -- which has a correlation engine that is used to spot anomalous activity on networks such as a worm -- was being used by brokerages to detect stock scams, said Rick Caccia, vice president of product marketing.

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