Federal Trade Commissioner Julie Brill on Obscurity
I think this is good:
Obscurity means that personal information isn’t readily available to just anyone. It doesn’t mean that information is wiped out or even locked up; rather, it means that some combination of factors makes certain types of information relatively hard to find.
Obscurity has always been an important component of privacy. It is a helpful concept because it encapsulates how a broad range of social, economic, and technological changes affects norms and consumer expectations.