Open secret and Public knowledge

Open secret noun - Something that is supposed to be secret but is generally known.

Public knowledge and open secret are semantically related. in something generally known topic. In some cases you can use "Public knowledge" instead a noun phrase "Open secret".

Public knowledge noun - Knowledge that is available to anyone.

Open secret and public knowledge are semantically related. Sometimes you can replace phrase "Open secret" with "Public knowledge", this phrases are similar.