By the time a trade secret case reaches discovery, plaintiffs often speak as though every similarity between two products must prove theft. But the law is clear: independent development and reverse engineering are not misappropriation—they are part of the competitive process that trade secret law was never meant to suppress.
Under both the Defend Trade Secrets Act and the South Carolina Trade Secrets Act, a claim of misappropriation fails if the information was obtained through “proper means.” And the statutes explicitly identify reverse engineering as one such proper means. The logic is simple: if a competitor can lawfully purchase or observe your product and, through skill and effort, figure out how it works, the law will not punish that effort. Secrecy is your responsibility—not the world’s obligation to ignorance.
That principle strikes at the moral balance of trade secret law. Trade secret protection is not a monopoly like a patent. It rewards secrecy, not invention. Once a product enters the public domain—sold, demonstrated, or shipped without sufficient concealment—its internal workings are exposed to legitimate inquiry. If another company can reconstruct your method from what’s publicly available, that’s fair competition, not theft.
The “eternal vigilance” standard recognized by South Carolina courts underscores this truth. A company cannot rely on vague assertions of confidentiality once it’s placed the relevant information into the marketplace. Eternal vigilance means continuous protection; once that vigilance lapses, the secret is lost. In effect, reverse engineering is the marketplace’s test of whether secrecy ever really existed.
Of course, not every claim of “reverse engineering” is honest. Courts look closely at how the information was obtained. If a former employee carried files out the door or accessed systems post-departure, that is misappropriation, not ingenuity. But if a rival buys the finished product off the shelf and decodes it through legitimate effort, that act is protected.
For defendants, the reverse-engineering defense is both a shield and a story. It reframes the dispute from “theft” to innovation: from alleged wrongdoing to independent achievement. In a world where trade secret claims are increasingly wielded as competitive weapons, that distinction matters.
Trade secrets law protects secrecy, not entitlement. Once the product is out in the open, the right to study, dissect, and improve upon it belongs to everyone willing to do the work.
