How trade secret protection actually works in Australia

What trade secret protection actually is

Every business holds information it would rather not share: a formulation, source code, a pricing model, a customer list, a supplier's terms. When that information is not generally known and gives the business an edge, the law treats it as a trade secret, an asset in the same family as patents, trade marks and copyright.

Unlike those registered rights, a trade secret gets no certificate and no register. Australia has no Trade Secrets Act. Protection is built from two sources that work together: the equitable duty of confidence, which is judge-made law that binds people who receive secret information, and the contracts you put in place, which turn general expectations into specific obligations.

This article walks through how that protection actually operates: what a court looks for when deciding whether information is a trade secret, how an obligation of confidence attaches to the people who receive it, the documents that do the heavy lifting, what happens when a secret leaks, and where protection most commonly fails.

Who is involved when secrets change hands

Secrets change hands through a small cast of players, and each has a different role in how protection is created, held and enforced:

Your business: owns the information and decides what is shared, with whom, and under what conditions. Nothing is protected until the owner treats it as secret.
Employees and contractors: hold the information day to day. Their duties differ depending on whether they are still employed and on what their contracts say.
Counterparties: suppliers, agencies, investors, customers and partners who receive information. They are bound only if the circumstances or a contract impose an obligation.
The courts: because there is no regulator and no register, protection is enforced privately. Courts decide whether information qualifies, whether an obligation existed and was breached, and what remedy fits.
The privacy regulator: a separate regime under the Privacy Act 1988 (Cth) governs personal information about individuals. Most trade secrets are business information, not personal information, so privacy law rarely overlaps, but the two are often confused.

What makes information a trade secret

The starting point for Australian courts is the classic three-element test from Coco v AN Clark (Engineers) Ltd [1969] RPC 41, which has been applied in Australia, including in Del Casale v Artedomus (Aust) Pty Ltd [2007] NSWCA 172. For a breach of confidence claim to succeed, the information must:

have the necessary quality of confidence, meaning it is not public knowledge and is more than trivial or commonplace;
have been imparted in circumstances importing an obligation of confidence, such as a signed NDA, a document marked confidential, or a conversation in which both sides understood the material was secret; and
be used or disclosed without authorisation in a way that causes detriment to the owner.

Detriment is usually easy to show when a competitor gets a head start. Courts also recognise the springboard doctrine: in RLA Polymers Pty Ltd v Nexus Adhesives Pty Ltd [2011] FCA 423, using the confidential information was said to let the recipients bring competing products to market more quickly than they otherwise would have, and that head start was itself the misuse.

The courts also draw a line between two classes of information when someone leaves a job, following Faccenda Chicken Ltd v Fowler [1987] Ch 117 and Wright v Gasweld (1991) 22 NSWLR 317. Trade secrets and specific confidential information, such as a customer list or a secret source, cannot be used by a former employee. General skill and know-how acquired in the job can be used, unless a valid contractual restraint says otherwise. In deciding which class information falls into, courts weigh how widely it is known inside and outside the business, its value to competitors, and the effort spent developing it: Del Casale v Artedomus.

How an obligation of confidence attaches

The equitable duty of confidence arises from the circumstances of disclosure. If you hand over information in a context where a reasonable recipient would understand it was secret, equity binds them whether or not anything is signed. That is the default protection, and it is why a document marked confidential, a clear verbal warning, or a discussion framed as being in confidence can matter even without paperwork.

Contract does the precise work. An NDA or confidentiality clause defines what counts as confidential, what the recipient may do with it, how long the obligation lasts, and what happens on breach. It converts the general equitable duty into terms that are easier to prove and easier to enforce.

Employment adds a further layer. During employment, an employee owes an implied duty of good faith and fidelity to the employer, which protects confidential information even if no clause says so: Robb v Green [1895] 2 QB 315, as applied in Del Casale v Artedomus. Once employment ends, that implied duty drops away, and confidentiality is governed by the equitable principles and by any express clauses in the contract. That is the gap that post-employment restraints and careful exit processes are designed to fill.

The documents that turn protection into obligations

Four documents do most of the work of converting general duties into enforceable terms:

Non-disclosure agreement: signed before you share information with a potential partner, supplier, advisor or investor. It should define the information, the permitted use, the term, and the return or destruction of material.
Employment contract: should contain confidentiality, IP ownership and return of property clauses. During employment the implied duty of fidelity already protects you, but an express clause makes obligations clear and survives in defined form.
Contractor agreement with IP assignment: the default rule in the Copyright Act 1968 (Cth) is that the author owns the copyright in what they create: s 35(2). An employer owns works made under a contract of service: s 35(6). A contractor is not an employee, so unless the agreement assigns ownership, the contractor owns the code, documents and designs you paid for. Section 35(3) allows the position to be varied by agreement, which is what an IP assignment clause does.
Restraint clauses: non-compete, non-solicitation and non-dealing provisions can protect confidential information and customer connections after someone leaves. They are enforceable only if they go no further than reasonably necessary to protect legitimate business interests, and the employer carries the onus of proving that. The reasonableness of the restraint is assessed at the time the contract was signed: Samsung Electronics Australia Pty Ltd v Grenville [2024] NSWSC 608. In NSW, s 4(1) of the Restraints of Trade Act 1976 (NSW) lets a court read down an overbroad restraint rather than strike it out entirely. At common law in other states a court will not rewrite the clause, so an overbroad restraint is likely to fail, and drafting matters more.

What happens when a trade secret leaks

A leak usually comes to light through a departing employee, a suspicious new product, or a counterparty using information beyond the agreed purpose. The sequence that follows is well established.

First, secure and preserve. Revoke access, collect devices, and keep logs, versions and communications intact. Evidence assembled in the first days often decides the dispute.

Second, check the paperwork. The NDA, employment contract and contractor agreement define what was promised, and the court will assess the conduct against those terms and against the equitable duty.

Third, consider urgent relief. An interlocutory injunction can stop further use or disclosure while the matter is resolved. The applicant must show a serious question to be tried, that damages would not be an adequate remedy, and that the balance of convenience favours the injunction: Samsung Electronics Australia Pty Ltd v Grenville. Courts hear these applications urgently, because a few weeks of continued misuse can destroy the value of a secret.

Fourth, pursue final remedies. Australian courts can grant a permanent injunction, order delivery up or destruction of the material, and award damages or an account of profits. In RLA Polymers v Nexus Adhesives, three former employees used their knowledge of the company's flooring adhesive formulations to develop competing products, and the court ordered an account of the profits made from the competing sales. In Del Casale v Artedomus, former directors used knowledge of the source of the company's stone to set up a competitor, and the Court of Appeal upheld a permanent injunction and an account of profits.

Where trade secret protection commonly fails

The failures that reach the courts are rarely exotic. They cluster around a few recurring mistakes:

Sharing before the NDA is signed: If the first disclosure happens in a casual call or an unmarked draft, the obligation of confidence may still arise, but proving it is harder. Protectability is decided by how the information was treated, and an unprotected first disclosure is the most common gap.
Treating everything as secret: Information that is public knowledge, trivial or readily ascertainable is not protected. Overreach also weakens credibility: a court is less likely to find genuine secrecy in a business that marked everything confidential and controlled nothing.
Publishing the secret: A pitch deck, website or product launch that reveals the underlying method or formula can destroy confidentiality. Marketing should tell the value story, not the mechanism.
Assuming contractors' work belongs to you: Without an assignment, the contractor owns the copyright: Copyright Act 1968 (Cth) s 35(2). The dispute is then about ownership, not confidentiality.
Restraints drafted too widely: A restraint that blocks any work with a competitor, regardless of role, is vulnerable. In NSW a court may read it down; elsewhere it may fail entirely: Samsung Electronics Australia Pty Ltd v Grenville.
Confusing trade secrets with general know-how: A departing employee can use the skills they developed. What they cannot take is the specific confidential information: the customer list, the pricing model, the secret source. Drawing that line in the employment contract in advance prevents the most common boundary disputes.

Where a trade secrets lawyer helps

Trade secret protection is built from documents and discipline, and both are easier with advice. A lawyer can help identify which information is genuinely protectable, draft the NDA, employment and contractor documents so that confidentiality, IP ownership and restraints work together, and design restraints that fit the role and survive scrutiny.

When something goes wrong, the lawyer's role shifts: preserving evidence, mapping the contractual and equitable claims, sending a carefully worded letter of demand, and, where needed, applying urgently to court for an injunction. Because the first 48 hours after a suspected leak often determine what remedies remain available, early involvement can be the difference between containing the damage and watching a head start evaporate.

The feature of trade secret law that surprises most business owners is that protection is decided at the moment of disclosure, not at the moment of breach. A court looks backwards at how the information was treated when it left your hands: whether it was genuinely secret, whether the recipient understood they were bound, and whether the paperwork supported that understanding. You cannot repair a careless first disclosure afterwards, and you cannot make a leaked secret confidential again.

That is why the practical work is all upstream. Identify the few things that are truly secret, share them only under signed obligations, own the work you pay contractors to create, and keep the records that prove you treated the information as confidential. Done well, this is modest effort that converts your know-how into an enforceable asset. Done late, the cost is measured in injunctions, accounts of profits and lost head starts.