The Prime Minister is coming under pressure to tighten controls over information that could be used to help United States drone attacks, Radio new Zealand reports.
But John Key said he was confident information shared with other powers, including the United States, met New Zealand's obligations under both local and international law.
Mr Key has confirmed information gathered by the Government Communications Security Bureau could have been used in identifying targets for American attacks using unmanned aircraft.
However, he said the GCSB did not supply information leading to the death of New Zealander Daryl Jones in a drone strike in Yemen last year.
Mr Key said New Zealand has shared information with the International Security Assistance Force in Afghanistan, but he cannot be sure exactly what use it was put to.
United Future leader and government minister, Peter Dunne said a public debate was needed about just how much information should be made available.
Green Party co-leader Russel Norman said most people would be appalled information gathered by the Government's electronic spy agency could help target drone attacks.
He said there are serious ethical questions about New Zealand's supplying information that may lead to extra-judicial killings.