Malicious insider attacks to rise

The world's biggest software maker has warned companies to expect an increase in "insider" security attacks by disgruntled, laid-off workers.

Microsoft said so-called "malicious insider" breaches were on the rise and would worsen in the present downturn.

"With 1.5 million predicted job losses in the US alone, there's an increased risk and exposure to these attacks," said Microsoft's Doug Leland.

"This is one of the most significant threats companies face," he said.

As the general manager of the newly formed Identity and Security unit at the company, Mr Leland told BBC News the effects of such attacks could be far reaching.