Plato in the Republic recounts a story about a magical artifact, the Ring of Gyges, in Book II of the Republic. It is a device to motivate an investigation into the collective aspect of morality. Would anyone be ethical if they did not need to fear capture or punishment? Socrates ultimately argues that:
the man who abused the power of the Ring of Gyges has in fact enslaved himself to his appetites, while the man who chose not to use it remains rationally in control of himself and is therefore happy
So although this story is oriented towards a man and the individual conscience, it seems also possible (and possibly intended) to read this concern with accountability and corruption, and perhaps the social construction of morals more generally, to states, political classes and so on. Especially given how Plato is investigating an analogy in the Republic between the parts of soul and partitioning of cities.
What sorts of resources might be available around the question of the ring, especially in terms of contemporary social formations? Given the ubiquity of mass surveillance, it seems plausible that Plato's discussion of the ring may be present in philosophical letters about the moral ambiguities attached to certain new technologies (particularly as the Republic is seen as one of the founding documents discussing the nature of the Western polity.)
One resource that has turned up so far that seems important is Plato's Invisible Cities: Discourse and Power in the Republic by Ophir, which mentions the ring extensively (it grounds the invisibility in the title); and possibly Foucault's panopticism. What other sorts of resources might be pertinent to an investigation of surveillance and invisibility that might also relate to the ring?