Erin Nealy Cox, a former U.S. federal computer crimes prosecutor:

It's not a matter of if, it's a matter of when.

Art Coviello:

Our investigation has led us to believe that the attack is in the category of an Advanced Persistent Threat (APT).

A Secret Service analyst:

The experienced ones take their time and slowly bleed the data out.

David Sanger and John Markoff:

The International Monetary Fund was hit recently by what computer experts describe as a large and sophisticated cyberattack whose dimensions are still unknown.

David Chavern, Chief Operating Officer at the US Chamber of Commerce:

It's nearly impossible to keep people out. The best thing you can do is have something that tells you when they get in.

Christopher Drew and John Markoff:

Lockheed sells cybersecurity services to military and intelligence agencies, and some experts said its failure to take greater precautions with its own systems could be embarrassing.

Ashar Aziz:

The world is in this state of persistent insecurity.

Bruce Sterling:

This is gonna get worse before it gets better, and it's gonna get worse for a long time.

Bryan Sartin:

If you think financially motivated breaches are huge now, just wait another year.