The Australian Signals Directorate is one of Australia's most secretive agencies, responsible for decoding enemy messages, protecting us from cyber threats and collaborating with allied intelligence services.

Rachel Noble knows how the machine works, as the former head of ASD she helped shape Australia's role in the Five Eyes alliance.

Now, with Trump's return and Signal-gate leaks, can Australia still trust its closest ally?

Guest: Rachel Noble, former Director-General of Australia Signals Directorate

Recommendations:

Geraldine: The Crisis of our Time by Christopher Clark

Hamish: East West Street by Philippe Sands

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