Businesses share sensitive information every day — with suppliers, contractors, prospective buyers, and employees. Yet many owners assume that labelling something "confidential" or getting a signature on a non-disclosure agreement is enough to protect it. The law is more demanding than that.
Australian courts protect confidential information through the equitable action for breach of confidence, but that protection only attaches when two distinct legal elements are satisfied. Understanding what those elements are — and how they work in practice — is essential for any business that trades on information it cannot afford to lose.
This article explains:
- what gives information the "necessary quality of confidence"
- what circumstances must exist before a legal obligation of confidence arises
- where businesses most commonly go wrong
- how a solicitor can help if you need to protect or enforce your confidential information rights
The first element: the necessary quality of confidence
For information to attract legal protection, it must not be public property or in the public domain. That principle was settled in Saltman Engineering Co Ltd v Campbell Engineering Co Ltd (1948) 65 RPC 203, where Lord Greene MR held that what makes information confidential is that the person who compiled or developed it used their own skill and effort to produce a result that cannot simply be lifted from publicly available material.
This means the mere fact that you regard something as sensitive is not enough. If your competitor can lawfully obtain the same information from a trade publication, a public register, or straightforward observation of your product, courts will not treat it as confidential.
There are no rigid categories of information that automatically qualify. Commercial and technical information — sometimes called trade secrets — are assessed by reference to the surrounding circumstances. In Ansell Rubber Co Pty Ltd v Allied Rubber Industries Pty Ltd [1967] VR 37, Gowans J set out six considerations that guide that assessment:
- how widely the information is known outside the business
- how widely it is known among the business's own employees and associates
- what steps the owner has taken to guard its secrecy
- how valuable the information is to the business and to its competitors
- how much effort and expense went into developing it
- how difficult it would be for a competitor to independently acquire or replicate it
These are not a checklist of mandatory requirements — they are factors the court weighs in the round. A customer list that took years to build, is not publicly available, and would deliver a real commercial advantage to a competitor can qualify as a trade secret even though a customer list sounds mundane. Conversely, a process that is merely a slight variation on a publicly known method is unlikely to qualify, regardless of how valuable it may feel internally.
Trade secrets are also not limited to innovative technology or novel products. Highly confidential commercial information — detailed pricing structures, margin data, or the identities of key clients — can qualify where its disclosure to a competitor would cause real commercial harm.
The second element: circumstances importing an obligation of confidence
Even if information has the necessary quality of confidence, it is only protected if it was communicated in circumstances that gave rise to an obligation to keep it confidential. In Mense v Milenkovic [1973] VR 784, McInerney J formulated the test this way:
"If the circumstances are such that any reasonable man standing in the shoes of the recipient of the information would have realised that upon reasonable grounds the information was being given to him in confidence, then this should suffice to impose upon him the equitable obligation of confidence."
The obligation is not just about what the recipient actually knew — it captures what they ought to have known. That matters for two reasons.
First, a recipient cannot avoid liability by claiming they did not read the confidentiality clause or did not realise the information was sensitive. If a reasonable person in their position would have understood the information was given in confidence, the obligation attaches.
Second, the obligation is contextual. A person who is given access credentials to a software system for a specific purpose does not, by virtue of that access, acquire any right to explore other parts of the system or to use the information they encounter for any purpose they choose.
Written non-disclosure agreements make this element easier to satisfy and provide stronger remedies if things go wrong — but a written agreement is not always required. The equitable obligation can arise from the nature of the relationship and the circumstances of the disclosure.
Where businesses commonly go wrong
Assuming the label is enough
Stamping "CONFIDENTIAL" on a document helps establish intent, but courts look at the substance of what was disclosed and how. If the information itself is already publicly available, no label saves it.
Disclosing too broadly
Once information is disclosed beyond what the legitimate purpose requires, the argument that it retains the necessary quality of confidence becomes harder to sustain. Sharing your pricing model with every attendee at a trade show, or circulating detailed financial projections to a large group of potential investors without any restrictions, risks destroying the confidentiality you were trying to protect.
Using confidential information received from others as a "springboard"
Australian courts recognise what is called the springboard doctrine. In Dart Industries Inc v David Bryar & Associates Pty Ltd [1997] FCA 481, Justice Goldberg applied the principle that a person who has received confidential information cannot use it as a platform to leap ahead in a development or design process, even if the end product looks different. The advantage gained by avoiding the preliminary work that others must undertake is itself a form of misuse. If a business wants to develop a competing product or process, it must do so through independent effort — not by shortcutting a sequence of work using information it received in confidence.
Failing to identify what is actually confidential before disclosing it
Many disputes arise because a business discloses information in the course of a commercial negotiation or a due diligence process without first deciding which information is genuinely sensitive and which is not. Once disclosed without restriction, retrieving that protection is very difficult.
How Artificer Legal can assist
Protecting confidential information involves both pre-emptive structuring and reactive enforcement, and the two require different skills.
On the prevention side, a solicitor can help you:
- identify which information in your business actually meets the legal test for confidentiality
- draft non-disclosure agreements that are enforceable and fit the context — a supplier NDA looks very different from an investor NDA or an employment confidentiality clause
- build internal policies and access controls that support the argument that you took the necessary steps to guard secrecy
- structure commercial transactions so that disclosure is limited to what the other party legitimately needs and is governed by clear written terms
On the enforcement side, if confidential information has been misused, a solicitor can advise on:
- whether the legal elements are satisfied on the facts
- what remedies are available — including injunctions to prevent ongoing use, and damages or an account of profits for past misuse
- the practical steps needed to preserve evidence and move quickly, since delay can weaken the case for injunctive relief
These are not steps to take after a problem has already become expensive. Artificer Legal works with Australian businesses to get the structure right early.
Conclusion
Legal protection for confidential information is not automatic. Two conditions must both be met: the information must have the necessary quality of confidence (it cannot be in the public domain), and it must have been communicated in circumstances that a reasonable person would recognise as creating an obligation of secrecy.
Key takeaways:
- Labelling information "confidential" helps but does not, by itself, create legal protection.
- The six factors from Ansell Rubber are the practical guide to whether business information meets the quality threshold.
- The test for whether circumstances create an obligation of confidence is objective — it is what a reasonable recipient ought to have understood.
- Trade secrets are not limited to technical innovations; commercially sensitive data such as customer lists and pricing structures can qualify.
- The springboard doctrine means that even indirect or partial use of confidential information can constitute misuse.
- Pre-emptive structuring — clear agreements, internal controls, and deliberate disclosure decisions — is significantly cheaper than enforcement after the fact.