Nearly two-thirds of New Zealanders believe the country's intelligence agencies work within the law, or they have more confidence in the agencies than in the past.
But a large minority, 28.2 per cent, have no confidence in the agencies at all.
The Herald-DigiPoll result comes after revelations of illegal spying and the publication of documents outlining surveillance in Pacific nations.
Those who had confidence that the agencies always worked within the law accounted for 33 per cent of respondents, while 30 per cent said they did not have confidence in them in the past but have more confidence now that they act properly.
Both the domestic intelligence agency, the New Zealand Security Intelligence Service (NZSIS), and Government Communications Security Bureau (GCSB), with its foreign intelligence mandate, have come under intense scrutiny after a series of revelations and allegations.