In the days of increased reliance on the Internet, hackers are making computers increasingly unsafe. To counter that, IT security firms are turning around and hiring talented hackers to find security system holes. Sebastian Schreiber's face lights up with a mischievous grin and his eyes gleam with excitement as he talks about computer hack attacks.

"Cross side scripting or SQL injection attacks -- these are really clever," said the man some describe as one of Germany's leading hired hackers. "It's fascinating to cheat computer systems, to break into systems to identify security holes and to demonstrate to our customers that we're able to compromise their systems."

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