Facebook has flagged concerns about plans to force technology companies to help police and intelligence agencies unscramble secure messages.
The federal government wants to introduce laws that help authorities gain access to encrypted information and devices - such as mobile phones and computers - from suspected terrorists and other criminals.
The legislation will also give federal police and domestic intelligence agency ASIO stronger powers to remotely conduct surveillance on the equipment.
While they already have the power to intercept encrypted communications, they don't have the ability to read them.
"We need to ensure that the internet is not used as a dark place for bad people to hide their criminal activities from the law," Prime Minister Malcolm Turnbull told reporters in Sydney on Friday.
More than half of serious investigations - from terrorism to paedophilia - involve some sort of encryption, compared to three per cent a few years ago.
Mr Turnbull said firms such as Apple and Facebook, which owns the popular message service WhatsApp, had to face up to their responsibilities.
"They can't just wash their hands of it and say it's got nothing to do with them," he said.
"What we need to do is to secure their cooperation."
But Facebook appears hesitant, saying it already has a protocol in place to respond to requests where it can.
"We appreciate the important work law enforcement does, and we understand their need to carry out investigations," a spokesperson said.
"At the same time, weakening encrypted systems for them would mean weakening it for everyone."
Mr Turnbull's cyber security advisor Alastair MacGibbon stressed the proposal wouldn't force companies to create a 'back door' or weakness in their systems.
"You're not asking the company to do anything wrong - you're asking the company to apply the same engineering and software smarts that are building the device to help police protect the public," he told ABC TV.
"There's nothing at all outrageous about this."
The government push follows the G20 Leaders summit in Germany where Australia led the way on discussions about encrypted technology.
The legislation, to be put to parliament later this year, will be similar to Britain's Investigatory Powers Act, which compels companies in the UK to hand over an encryption key so that scrambled messages can be read where there is a legal reason for police or other agencies to gain access.
Australian Federal Police acting commissioner Michael Phelan said it was essential that Australia's laws kept pace with technology.
"What we're advocating here ... is no change to what we're able to lawfully intercept, just now giving us the power to be able to see that material," he said.
Apple, in the second half of 2016, received 2,584 requests from Australian law enforcement agencies, governments and private parties wanting customer data connected to more than 5,100 devices - 87 per cent of which were granted.
Requests can be made for a variety of reasons, including help finding lost or stolen devices and fraud investigations.