Cash denies Heydon settlement cover-up

The government has denied covering up the settlement given to harassment victims of Dyson Heydon. (AAP)

The attorney-general has denied claims of a government cover-up after refusing to disclose the settlement amount paid by the Commonwealth to sexual harassment victims of former High Court judge Dyson Heydon.

Three of the former judge's associates, Rachael Patterson Collins, Chelsea Tabart and Alex Eggerking, have all signed non-disclosure agreements about the terms of the settlement.