A recent research provided from Imperva explained that one in every fifty employees is a malicious insider. This reaffirms Gartner’s research that the insider is not just disgruntled employees leaving the organization. Departing disgruntled leaving an organization is often anticipated, but the article warns that attention should also be rendered to current employees who sells information as a secondary source of income.
Impreva’s research, reviewed 140 security incidents and quizzed 250 UK based IT professionals which showed that these insider threats can have severe impacts on the organization. These events include theft or dissemination of confidential data, indemnity theft, loss of productivity and damage to equipment and facilities. The study showed that the biggest threat to enterprise security is the people that’s already on their payroll.
It also provides some mitigation and detecting techniques such as proper data classification, storage, and processes involving sensitive data.
Source: http://www.infosecurity-magazine.com/news/1-in-50-employees-a-malicious/