Optimism is good. But being overconfident about your ability to counter cyber attacks is dangerous. And that's what many security professionals are doing according to new research by SC Magazine. Eighty percent of survey respondents believe the chances of being breached are 50-50 or less. But the Ponemon Institute 2015 Cost of Cyber Crime Study finds the average company actually experiences 1.9 successful cyber attacks per week.

The disconnect seems to spring from respondents' confidence that they can block known attacks coupled with concern about new and unknown hacker threats. Read this report to learn:

• Respondents' highest cyber defense priorities
• How they view their ability to respond to breaches
• The five top action items for security pros