Sporting long sideburns, a bushy goatee and black baseball cap, instructor Ralph Echemendia has a class of 15 buttoned-down corporate, academic and military leaders spellbound. The lesson: hacking.

The students huddled over laptops at a Los Angeles-area college have paid nearly $4,000 (2,192 pounds) to attend "Hacker College," a computer boot camp designed to show how people will try to break into network systems -- and how they will succeed.

"It's an amazing thing how insecure the big corporations are," Echemendia said during a break in the weeklong seminar. "It's just amazing how easy it is."

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