wiredmikey writes "HR and Payroll outsourcing giant Automatic Data Processing, Inc. (ADP) experienced a system intrusion, the company announced Wednesday. ADP said it was investigating and taking measures to address the impact of a system intrusion that occurred with a client at Workscape, a benefits administration provider that ADP acquired in August 2010. ADP has also been actively cooperating with law enforcement to determine the cause of this incident and to assist authorities in identifying and apprehending those responsible. ADP added the following in a statement: 'Because this incident is the subject of an ongoing law enforcement investigation, ADP cannot disclose any additional details at this time. ADP will provide further updates once information that can be made public becomes available, and we will continue to communicate with all affected parties as appropriate.'"