Once again, California is a battleground for privacy advocates and Internet companies as they battle over “big data” collected from consumers.

California Assembly bill AB 1291, also known as the “Right to Know Act of 2013,” is supported by the Electronic Frontier Foundation and American Civil Liberties Union, among others. It would make that state the first in the nation to give consumers the right to demand from companies reports on what data is collected from them, how it is shared, and with whom. A similar requirement, often referred to as Habeus Data, is currently in place among member states of the European Union.