Direct opposites:
* Public: This is the most direct opposite, meaning information is accessible to everyone.
* Open: Similar to public, implying transparency and lack of secrecy.
* Revealed: This emphasizes that information is no longer hidden.
Other relevant words:
* Disclosed: This suggests that confidential information has been shared.
* Explicit: This implies that information is clearly stated and not hidden.
* Transparent: This emphasizes the lack of secrecy and the openness of information.
* Common knowledge: This suggests that information is widely known and not considered confidential.
The best opposite will depend on the specific situation and what you are trying to express.