The justices appeared skeptical of a challenge to the law brought by an adult-content industry group, producers of pornographic material and a porn actress.

The adult entertainment industry has said the law, which requires sites to verify that users are over 18, violates its free speech rights.

The Supreme Court appeared open Wednesday to upholding a Texas law requiring pornography websites verify the age of their users, as they expressed concerns during oral arguments about the ease children have accessing explicit videos online.