Tiffany Rad is turning software industry gender stereotypes on their head. Rad is a white hat, a hacker who specialises in looking for security holes so that they can be fixed. The attorney turned her computer-hacking hobby into a career in 2008, when she submitted a research proposal to an underground security conference in New York. Rad's talk there propelled her into the industry, and she is now manager of threat research for ThreatGrid, a specialist in malicious software analysis that Cisco Systems bought in May.

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