A final attempt to block information covertly obtained by Australian and US police through a digital Trojan horse in criminal networks has failed.

Operation Ironside was an international sting set up to clamp down on organised crime.

Encrypted AN0M devices were sent to alleged criminals and secretly monitored by the Australian Federal Police and the US Federal Bureau of Investigation.

Around 1700 devices were delivered to the criminal community during the three-year operation to 2021, according to AFP figures.

Presently, 392 people have been charged through Ironside in the Australian courts.

Two of these accused sought to challenge whether information gained by police through the AN0M app could be lawfully used as evidence in court.

The two men - who cannot be named for legal reasons

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