Daniel Anderl Judicial Security and Privacy Act of 2021 This bill generally prohibits federal agencies and private businesses from publicly posting certain personal information (e.g., home addresses) of federal judges and their immediate family members. It also (1) requires information to be removed upon written request from the federal judge concerned, (2) prohibits data brokers from purchasing or selling such information, and (3) establishes programs to protect such information at the state and local level and to enhance security for judges.