Ministerial staff in Kevin Rudd's government are being forced to list their history of sexual partners, reveal extra-marital affairs and detail homosexual experiences before gaining security clearance, reports Sydney's Sunday Telegraph newspaper. More than 300 ministerial and electorate staffers have been ordered to fill in a 25-page form and attend an in-depth interview into their personal finances, drug habits and sexual history before gaining high-level security clearance. Senior staff say they have been told the security form is designed to protect them from blackmail - but several have told the newspaper they were affronted at the personal information they had been forced to divulge. Friends are also interviewed, and information about drug use and sexual history is cross-checked. An Australian Federal Police source confirmed the security-clearance process requested personal details. "In the interview process, they ask you about your sexual orientation and whether you've ever had a homosexual experience,'' he said. "They ask you how many sexual partners you've had, whether you've cheated on your wife and about your sexual habits.''