When the first extortion e-mail popped into Michael Alculumbre's inbox, he had no idea it was about to cost his business nearly $500,000. The note arrived in early November of last year, as Alculumbre's London-based transaction processing company, Protx was being hit by a nasty distributed denial of service (DDoS) attack. Zombie PCs from around the world were flooding Protx.com (the company's Web site) and the transaction processing server that was the commercial heart of the business. continue
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