supersecrecy

/ˌsupərˈsikrəsi/
noun
  1. An extremely high level of secrecy, often involving classified information or sensitive operations.
    • Supersecrecy surrounded the development of the new technology until its official launch.
    • The agency's supersecrecy meant that even employees were not told the full details of their work.
    • The project was conducted under supersecrecy to prevent leaks to the press.
Antonyms
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