About ASD

The Australian Signals Directorate (ASD, formerly DSD) is an intelligence agency in the Australian Government Department of Defence, with its headquarters in Canberra.

Our mission, ‘Reveal their secrets, protect our own’, accurately summarises our role. ASD:

The overview of our signals intelligence role briefly describes our signals intelligence work for the Australian Defence Force and Australian Government and why it is secret.

ASD provides information security advice and services mainly to Australian federal and state government agencies. ASD also works closely with industry to develop and deploy secure cryptographic products.

The history of ASD begins in the Second World War, when Australian Navy, Army and Air Force personnel were brought together to support General MacArthur’s South-West Pacific campaign by intercepting and decoding Japanese radio signals.