Cloud Cover

Like other IT services, the locus of data security has moved. How one entrepreneur took advantage of the shift

THOMAS BROENING FOR TIME

Qualys CEO Philippe Courtot says technology without a purpose is useless.

Data security used to be all about spending big bucks on firewalls to defend data at the network perimeter and on antivirus software to protect individual computers. Internet-based computing, or cloud computing, has changed all that, at the same time expanding exponentially the chances for data thieves and hackers.

The cloud creates other opportunities too: a handful of security vendors now deliver security as a service--a one-two punch of hardware and software that monitors and manages an enterprise's data security and bills customers only for the computing power they use. "For years, security was about big companies pushing technology to their...

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