Cyber advocacy groups will have their say in a public hearing about proposed new laws surrounding encrypted messaging.
Digital Rights Watch, Access Now and Senetas will give evidence before a parliamentary committee which is sifting through information about intelligence agencies accessing encrypted messages.
The legislation would require technology companies to hand over encrypted messages when authorities are investigating crimes.
Digital Rights Watch chair Tim Singleton Norton has already warned the government to tread carefully when considering the legislation.
Technology companies have raised concerns that the proposed powers could erode customer trust and undermine public safety.
The government, pushed by Home Affairs Minister Peter Dutton, want the bill to clear parliament before Christmas.
Mr Dutton ramped up his bid to have the laws introduced as soon as possible following the terror attack in Melbourne.
But senior Liberal Scott Ryan raised late concerns about the bill on Thursday and how it would affect parliamentary privilege.
The committee will have its final public hearing on Tuesday, just two days before parliament rises for the year.