Sensitive information leaked in August 2016 concerns Submarines.

Explanation:
The sensitive information leaked in August 2016 concerns the defence platform of Submarines. In August 2016, classified documents related to India's Scorpene-class submarines were leaked, causing a major security breach for the Indian Navy.

The leak revealed crucial details about the submarines, including their stealth capabilities, combat systems, and other technical specifications. The leaked documents, comprising over 22,000 pages, were reported to have been taken from French shipbuilder DCNS, which was contracted to build six submarines for the Indian Navy.

The leaked information posed a significant risk to national security as it exposed vital details about the submarines' capabilities and potential weaknesses. It could potentially compromise India's strategic advantage in the Indian Ocean region, where submarines play a crucial role in deterrence and surveillance.

The leak prompted India to initiate a thorough investigation into the matter and take immediate steps to address the security concerns. The Indian government ordered a review of the entire submarine program to assess the potential damage caused by the leak and identify necessary measures to mitigate the risks.

The incident also highlighted the importance of stringent cybersecurity measures in protecting sensitive defence information. It served as a wake-up call for the Indian defence establishment to enhance its cybersecurity infrastructure and protocols to prevent such incidents in the future.

The leak of sensitive submarine information in August 2016 underscored the need for greater vigilance and security in safeguarding critical defence platforms. It emphasized the significance of maintaining strict control over classified information to protect national security interests.