A future Labour government would make it mandatory to report allegations of child sex abuse in a bid to prevent a repeat of the scandal in Rotherham.
Shadow Home Secretary Yvette Cooper said the move would help change the culture of institutions that had not taken abuse seriously enough in the past.
She told the Observerthe proposal would "challenge the idea that any professional should be tempted to think that things can be solved quietly or privately by brushing them under the carpet".
Children as young as 11 were raped by large groups of men, a new inquiry into child sexual exploitation in Rotherham has found.
A report into 16 years of child sexual abuse in Rotherham has concluded that the true scale of exploitation in the town will never be known.