From Leak-Proof Vaults to AI Surveillance: How 4 Countries Protect Their Toughest Medical Entrance Exams

Every year, tens of millions of students around the world sit entrance exams that can shape the course of their lives. With so much at stake, protecting these tests has become as important as conducting them fairly.

A single leaked question paper or an impersonator taking the exam for someone else can undermine months of hard work and shake public trust in the entire selection process.

In India, more than two million students appear for NEET-UG every year, making it one of the world's largest medical entrance exams. Across the globe, countries have developed their own ways to protect such high-stakes tests, with measures that often resemble national security operations.

China's high-tech gaokao

China's gaokao is the country's most important entrance exam. While it is not exclusively for medical admissions, top scores are essential for securing seats in the country's most competitive medical colleges.

The exam's security measures are among the most advanced in the world. Before entering the exam hall, all 13.35 million candidates recently appearing for the test underwent identity verification using facial recognition, fingerprints or iris scans to prevent impersonation.

Radio-frequency jammers and metal detectors are used to detect hidden communication devices, including tiny wireless earpieces. AI-powered cameras monitor exam halls and flag suspicious behaviour such as whispering or repeated glances between candidates.

To prevent misuse of artificial intelligence, major Chinese technology companies including Alibaba, ByteDance and Tencent temporarily disable image-recognition and question-answering features on their AI chatbots during the four-day exam period.

South Korea pauses the skies

South Korea takes a different approach, one that involves the entire country.

During the English listening section of the College Scholastic Ability Test (CSAT), also known as the Suneung, civilian and military flights — including those operated by United States Forces Korea — are suspended for around 35 minutes to ensure aircraft noise does not disturb the more than 500,000 students taking the exam.

The country's stock market opens an hour later than usual, and students running late can request a free police escort to reach their test centre on time.

Many of South Korea's highest-scoring students go on to join medical colleges, making the exam an important gateway to the profession.

Turkey's second layer of security

Turkey's Higher Education Institutions Examination (YKS), conducted by the Measurement, Selection and Placement Centre, attracts around 2.4 million candidates.

To prevent cheating, authorities can deploy signal jammers inside exam buildings, blocking unauthorised communication devices. Candidates must leave behind all personal electronics before entering the exam hall.

Every exam room is monitored through cameras. If footage later shows a candidate violating exam rules, they can be disqualified even if the incident was not noticed during the test.

Officials also ask residents living near exam centres to minimise noise on exam day so students can concentrate.

The US uses palm vein recognition

In the United States, security relies heavily on biometric technology.

Candidates appearing for the Medical College Admission Test (MCAT) at Pearson testing centres verify their identity using palm vein recognition, which maps the unique vein pattern beneath the skin using near-infrared technology.

Candidates are scanned again each time they leave and re-enter the testing room, helping prevent identity substitution during the exam.

A common goal

Although these countries use different methods, they share the same objective: ensuring every student gets a fair chance.

Traditional safeguards such as sealed question papers and secure storage are now being complemented by biometrics, AI-powered monitoring and stronger technological safeguards. As entrance exams continue to grow in scale, so do the efforts to protect the dreams of millions of students who depend on them.

Sources

'India holds re-exam under tight security following leak': by Reuters via The Express Tribune, Published 21 June 2026

'Paper setters in lockdown, 5L security staff: NTA big steps to make NEET retest leak-proof': by The Tribune, Published 8 June 2026

'Gaokao sees high-tech vigilance meet human care': by EYESHENZHEN, Published 10 June 2025

'South Korea to halt military, civilian flights during nationwide college exam': by Stars and Stripes, Published 12 November 2025

'Türkiye begins nationwide university entrance exam as officials urge silence': by Türkiye Today, Published June 2026

Source: The Better India