The Federal Government has announced plans to force overseas technology companies to unlock encrypted messages.
Prime Minister Malcolm Turnbull says the internet is now a place where terrorists, paedophiles and drug traffickers can hide in the dark.
He says they're using social media and encrypted messaging services such as WhatsApp to communicate, and his government plans to tackle the issue in parliament.
The laws will be modelled on a system in place in the United Kingdom, giving police and security agencies greater access to encrypted messages.