"Security doesn't happen by accident, it doesn't happen by chance," says Professor Hovav Shacham. Shacham has uncovered security vulnerabilities involving the full-body backscatter, X-ray scanners deployed at entrances to airports, train stations and other public places. Here he observes the different mindsets involved with engineering and security research. Series: "Computer Science Channel" [Public Affairs] [Science] [Show ID: 31922]