Top scorer on South Korea's tax exam confesses to cheating with AI and a hidden camera
A near-perfect score that seemed impossible turns out to have been AI-assisted fraud, days before the country's high-stakes national college exam.
What happened: A test-taker identified by the surname Han, who topped South Korea's certified public tax accountant exam in both April and July, confessed through his lawyer that he cheated using generative AI. He scored 397.5 out of 400 on the first round, missing just one of 160 questions. Han said he photographed exam questions with a microcamera, sent the images to an AI tool, and read back the answers on a smartphone. He submitted a written confession to Seoul police, who have assigned investigators to the case.
Why it matters: In South Korea, standardized exams determine careers and social standing more directly than almost anywhere else. A scandal over AI-assisted cheating on a professional licensing exam threatens trust in that entire system, especially just days before the country's annual national college entrance exam, which millions of students spend years preparing for. The timing turned a single cheating case into a national political concern, pulling in the prime minister and the presidential office.
How it works, plainly: Han's method combined old-fashioned smuggling with new AI speed: a tiny hidden camera captured exam questions, those images were sent off-site to a generative AI system, and answers came back fast enough to use during the test itself, relayed through a smartphone. Suspicion first centered on smart glasses, which he denied using. The core problem for exam security is that AI can now solve complex questions almost instantly, so any way of getting a question out of the room becomes a way of cheating.
The rollout: Seoul police are investigating Han's case after his lawyer-submitted confession. With the national college entrance exam held days later, the presidential chief of staff for policy convened an emergency meeting to prepare countermeasures, and Prime Minister Han Seong-sook's office pledged to oversee the exam closely to keep it fair. No specific new screening technology or rule changes were detailed in the available reporting, only a commitment to tighten oversight before and during Thursday's test.