A recent survey found that 19 percent of U.S. employees working in an office setting admit having opened an e-mail at work that they suspected was either fake or a phishing scam, but didn't notify their IT department that they had done so.

The survey of 2,084 U.S. adults, conducted in May and June by Harris Interactive on behalf of Courion Corporation, also found that 23 percent of office workers say they don't understand why their employer makes them change passwords so often.

"These are otherwise intelligent people who, if informed about the potential consequences of their actions, would do the right thing," Chris Sullivan, vice president, advanced intelligence solutions at Courion, said in a statement. "Any employee may succumb to natural curiosity. Before curiosity kills the cat, organizations need to get their arms around this behavior. They need to educate their employees and use systems that eliminate risky activities."