(a) Except as provided in subsection (b) of this section, a paper filed in a case under this title and the dockets of a bankruptcy court are public records and open to examination by an entity at reasonable times without charge. (b) On request of a party in interest, the bankruptcy court shall, and on the bankruptcy court's own motion, the bankruptcy court may - (1) protect an entity with respect to a trade secret or confidential research, development, or commercial information; or (2) protect a person with respect to scandalous or defamatory matter contained in a paper filed in a case under this title.