Trade Secrets and Unfair Competition in Korea: Requirements and Claims

An ex-employee walks out with the customer list. A latecomer launches a near-identical product. A startup's pitch deck reappears as a competitor's new campaign. Korean law answers these in two parallel tracks under the Unfair Competition Prevention and Trade Secret Protection Act: the trade-secret track and the unfair-competition acts listed in article 2(1).

The two tracks differ in subject matter and proof, so the same facts can yield different outcomes depending on which one you pick. The August 21, 2024 amendment also raised punitive damages for wilful trade-secret infringement from three to five times actual damages, and added a new criminal penalty for destroying or altering trade secrets. This article maps both tracks side by side and walks through the strengthened sanctions.

Three Elements of a Trade Secret

Article 2(2) of the Act defines a trade secret as information not publicly known, with independent economic value, that is managed as a secret — covering production methods, sales methods, and other technical or managerial information useful for business. Korean precedent unpacks that into three elements; missing any one of them strips the information of trade-secret protection.

1. Non-publicity — not known through publications, the internet, or general industry sources, so it cannot ordinarily be obtained without going through the holder
2. Economic value — using the information yields competitive advantage, or its acquisition or development required significant cost and effort
3. Secrecy management — objective indicators (markings, access controls, NDAs, audit trails) showing the information is actively managed as confidential

Unfair Competition: Acts (a) Through (p)

Article 2(1) lists the acts that count as unfair competition. They run from item (a) through (p) in Korean letter sequence (가목 to 파목), each capturing a different fact pattern. The first step in any dispute is identifying which item the conduct fits, because the proof and remedies vary.

Four Frequently Used Claim Types

Item (i) — Product Shape Copying

Item (i) prohibits transferring, displaying, importing, or exporting a product that copies another's product form within three years of the original launch. It works even when the original is not a registered design, making it the first response to dead copies. The three-year window is strict, so delayed detection can cut off the right entirely. Functional or technically necessary shapes are excluded, so a comparison that separates aesthetic from functional features is required.

Item (c) — Dilution of Famous Indications

Item (c) addresses tarnishment or blurring of indications well known in Korea. It captures dilution beyond the registered trademark scope: even without direct source confusion, the right exists if the famous indication's distinctiveness or reputation is harmed. Proof of fame is the friction point — gather advertising spend, sales figures, media coverage, and survey data well before any dispute crystallises.

Item (j) — Idea Misappropriation

Item (j) covers ideas shared in business proposals or negotiations being used outside the disclosed purpose without consent. It plugs gaps where information is not yet trade-secret-grade. The decisive factor is whether the parties had a confidentiality or use-limit understanding at the disclosure stage, so NDA paperwork from negotiations is the centre of gravity.

Item (p) — General Catch-All

Item (p) is a general clause: using another party's significant investment or effort 'in a manner contrary to fair commercial practice or competitive order' to harm their economic interest. It absorbs new free-riding patterns that earlier items do not catch. The Supreme Court has applied it carefully, with 'significant investment or effort' as the threshold rather than mere imitation.

August 2024 — Punitive Damages Up to 5x

Effective August 21, 2024, the punitive-damages cap for wilful trade-secret infringement increased from three times to five times actual damages. Only Korea and China currently use a five-times cap, putting Korea among the world's strictest. The same amendment added a new criminal penalty for unauthorised destruction, deletion, or alteration of another party's trade secret — up to 10 years' imprisonment or KRW 500 million in fines source.

Available Claims and Procedure

Trade-secret and unfair-competition cases run on three axes — civil (main suit), criminal complaint, and provisional injunction. Ongoing infringement is usually halted via an injunction first, with damages, prohibition, and destruction sought in the main suit. Wilful or aggravated cases trigger criminal complaints in parallel. Damages calculations rely on article 14-2 (presumption of damages) plus the punitive multiplier where wilfulness is shown.

Frequently Asked Questions

Q1. Is signing an NDA enough to satisfy the secrecy-management element?

No. An NDA helps but does not stand alone. Courts evaluate the full system: confidential markings, tiered access, audit logs, physical storage controls, screen watermarks, and print restrictions. A repeatable, system-level access regime — not one-off paperwork — is what carries the secrecy-management element.

Q2. How does item (i) differ from registered-design infringement?

Design-registration infringement turns on the registered design's scope. Item (i) covers product-shape copying within three years of the original launch regardless of registration. It is the responsive tool when registration is delayed or absent. Functional or technically necessary shapes are excluded, so the comparison must separate aesthetic from functional features.

Q3. What if a departing employee's takeaway does not qualify as a trade secret?

Other tracks remain. Even when secrecy management falls short, item (j) (idea misappropriation), item (p) (general catch-all), contractual confidentiality and non-compete obligations, the civil-law principle of good faith, and the criminal offence of breach of trust can all be invoked. NDA and non-compete clauses signed at termination support separate damages claims, so evaluate the facts across multiple legal layers rather than depending on one.