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Breach of Confidence in Australia: Elements, Tests and Remedies

Breach of confidence is an equitable action protecting confidential information. Australian courts apply a four-part formulation developed from Coco v A N Clark (Engineers) Ltd [1969] RPC 41 and later Australian authority: the information must be identified with specificity, have the necessary quality of confidence, have been received in circumstances importing an obligation of confidence, and there must be actual or threatened misuse.

A note on citations: Victoria University of Technology v Wilson is a 2004 decision of the Supreme Court of Victoria — the correct citation is Victoria University of Technology v Wilson [2004] VSC 33; (2004) 60 IPR 392 (Nettle J). Citations placing it in 1994 or in the Commonwealth Law Reports (such as “(1994) 181 CLR 221”) are wrong: the CLR series reports High Court decisions, and this is a single-judge Victorian decision. If a research tool gave you a 1994 CLR citation for this case, the citation was fabricated.

Elements of the action

  • The information must be identified with specificity, not in global terms.
  • It must have the necessary quality of confidence — not public knowledge or trivial.
  • It must have been imparted (or taken) in circumstances importing an obligation of confidence.
  • There must be actual or threatened unauthorised use or disclosure. Whether detriment is a separate requirement remains debated.

Victoria University of Technology v Wilson

Wilson concerned university academics who developed an invention and pursued a commercial opportunity arising in the course of their employment without disclosing it to their employer. Nettle J held the academics owed and breached fiduciary duties, and dealt in detail with the remedies — constructive trust and account of profits, including the allowance to be made for the fiduciary’s own skill, effort and capital.

A second note for citation-checkers: the case is often described in AI-generated summaries as a “confidential information case”. The court’s own catchwords frame it as a fiduciary-duty case — the scope of academic employees’ fiduciary obligations, exploitation of a business opportunity arising during employment, and the constructive-trust remedy. It is widely cited on those questions, alongside the breach-of-confidence authorities below.

The doctrinal frame in the High Court

Moorgate Tobacco Co Ltd v Philip Morris Ltd (No 2) (1984) 156 CLR 414 confirmed that the action rests on the equitable obligation of conscience, not on any general tort of unfair competition. ABC v Lenah Game Meats Pty Ltd (2001) 208 CLR 199 reaffirmed the equitable basis of the doctrine while declining to recognise a free-standing privacy tort, and Smith Kline & French v Department of Community Services and Health applied the doctrine to information given to government.

Key authorities

Related doctrine guides

This guide was generated by Barrister AI from the primary authorities linked above. It is general information, not legal advice — verify every proposition against the linked judgments before relying on it. Open any case above to read the judgment, or try Barrister AI free to research across the full knowledge graph of Australian legal principles.