More than 19 thousand sensitive files related to India’s largest nuclear power plant, Kudankulam Nuclear Power Plant, have been claimed to be leaked on the dark web. Cyber hacker group World Leaks says that it has made public many confidential documents related to the plant. However, the authenticity of these documents has not yet been independently confirmed. Cyber security experts say that if this claim proves true then it will be a matter of serious concern for the security of the country’s critical infrastructure.
According to the report, these files are part of a larger data leak involving around 8.58 lakh documents, which were allegedly stolen from the servers of Reliance Group, the contractor associated with the Koodankulam project. Reliance Group has confirmed a partial data breach. According to the company, the affected server was hosted on third party data center company Yotta and the matter has been informed to the government. However, the company did not clarify which data was affected.
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Which documents are claimed to be leaked?
News agency Reuters has seen many documents between 2016 and 2025, but at present their authenticity has not been confirmed. According to the report, the leaked files include engineering blueprints of ventilation and cooling systems, floor plans of the control room, inspection reports of machines and equipment, lists of suppliers and vendors, records of meetings and insurance related documents. It is being told that most of these documents are related to the under construction Unit-3 and Unit-4 of Kudankulam Nuclear Power Plant. However, it is a matter of relief that till now no such information has come to light that the design of the main system of the nuclear reactor has also been leaked.
Experts expressed concern over security
Cyber security experts say that even though no evidence has been found that the main operating system of the reactor has been compromised, such information can prove useful for cyber criminals. According to Nicholas Roth, a senior official of the US organization Nuclear Threat Initiative (NTI), from these documents it can be found out who has access to the project and which systems are being used. This may increase the possibility of cyber attacks in future.
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CERT-In and NPCIL are investigating
The matter is being jointly investigated by the Indian Computer Emergency Response Team (CERT-In) and Nuclear Power Corporation of India (NPCIL). Yotta reported that suspicious activity was detected on one of its servers on May 29 and a potential ransomware attack was blocked. After this, Reliance Infrastructure informed about the claim of data leak. This matter has come to light at a time when incidents of cyber attacks are continuously increasing in India. According to cyber security company Surfshark, last year more than 2.89 crore accounts in the country were victims of data leak.
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