Immigration Minister Peter Dutton has linked asylum seekers with terrorism, insisting recent attacks overseas have made border security a key issue for voters at the election.

"They want to make sure that we know who's coming to this country – they've seen what's happened in Istanbul and in Brussels and in Paris," he told Sky News on Thursday night.

"We've shown over the course of the last couple of years that we've been able to stop people boarding planes that have been on their way to Australia, we think, to do harm."