Mandia knows a lot about cyber threats. The Silicon Valley-based FireEye has worked for more than 200 of the Fortune 500's companies, helping major corporations protect their computer systems from cyberattacks.
When hackers hit Sony Pictures in December and health insurer Anthem in February, both companies hired FireEye to fix the breach after data was compromised. However, Mandia claims that the "average risk is low" to most people's data on their own computers and smartphones.
"At the end of the day, most attackers are not targeting people unless you're very high net worth, or you're a prominent government official, or you're a famous person," he says. Mandia adds that if you're not in any of those categories that doesn't mean you're completely out of the woods.
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"You will probably be maybe a 'drive by shooting' on the information highway," he added. To keep your information data from becoming a casualty, however, Mandia suggests you practice common sense.
He says be careful and don't click on links in e-mails or invites via Skype or instant messaging "that don't make sense."
A report from Symantec found global cyber attacks against large companies were up 40 percent in 2014 versus 2013.
Frequently, hackers are successful because employees simply respond and click on tainted e-mails, allowing the cyberattack into the company's computer system. But how can companies combat the accidental employee who opens the door for hackers, with a simple click?
"If you have a company of 100,000 people, you're never gonna get all 100,000 people to never open that link," he said.
What you hope to do, he says, is "train enough people so you can raise the bar of human detection."
Mandia explained, that means "hoping one of the ten recipients" of that tainted e-mail will "detect the threat and tell security staff."