FRAUDSTERS require anonymity to stay out of jail, but in the cat-and-mouse world of financial security the good guys often live in the shadows too. Every credit card company employs analysts to pore over daily transactions and look for suspicious activity. They rarely discuss their work in public, but with permission from his company and on the condition of anonymity, the top Australian security officer for one international credit card issuer agreed to explain how his team tries to stay ahead of the thieves. A former inspector in the NSW fraud squad, the analyst has attended university courses in forensic accounting in Australia and overseas. His team operates from a Sydney office with a fingerprint reader at the entrance. Inside, there are fewer than 12 workstations, with up to three computer screens on each desk to monitor...
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