7 principles behind being scammed

The Madoff debacle has many of us wondering just how so many sharp people made such a tragic mistake.

A pair of researchers from the University of Cambridge's Computer Loboratory recently released a report that explains just how we fall victim to scams like Madoff's: three-card monte, the ring reward rip-off, the money machine scam, and the shop phone call swindle. The key? Those darned inconvenient human emotions.

In their paper, Frank Stajano and Paul Wilson broke our vulnerabilities into seven principles: