A study by the Ponemon Institute has found that many organizations simply don't know if they're being targeted by cyber attacks.

"Some 41% of more than 500 US organizations polled said they were unable to determine if they were being targeted by zero-day and other advanced cyber threats designed to evade countermeasures," writes Computer Weekly's Warwick Ashford.

"Ponemon found that 69% of respondents use anti-virus tools and 61% use an intrusion detection system, but 90% said exploits or malware have evaded these tools, or that they are not sure," Ashford writes. "Only 19% said their IT leaders are fully aware of the challenge of, and requirements for, defending against advanced attacks."

Click here to read the Computer Weekly article.