In addition, several of the country's television companies are showing commercials that ask viewers to consider the question: "When the government hides the truth for you, what are the dark ones?"
The backdrop is the backlash against Australian journalists conducted earlier this year.
"Police's intervention against News Corp journalist Annika Smethurst and ABC's headquarters in Sydney were direct attacks on freedom of the press in Australia, but they are just the tip of an iceberg," said Paul Murphy, chairman of the MEAA trade union.
The Australian media has several requirements, including that journalists should be exempted from certain national security regulations.
"The culture of secrecy stemming from these regulations limits all Australians' right to know and goes far beyond the original intent of national security," says Murphy.
Three journalists risk imprisonment as they have worked with secretly stamped source material. News Corp journalist Annika Smethurst, among others, has reported on secret political deliberations on how the justice system should have access to new surveillance methods and two ABC reporters have revealed alleged war crimes by Australian soldiers in Afghanistan.
Unlike in many other countries, freedom of the press is not guaranteed in the Australian Constitution. A report on freedom of the press will report its results to Australia's parliament next year.