The state requires persons applying for state welfare assistance, driver's licenses, admission to the state university, or certain other state benefits to list their federal social security numbers as part of their applications. in this connection, state agencies refer to an applicant's social security number as his or her "central file number." the plaintiff has brought an action in a federal court against certain specified state officials for an order enjoining them from using social security numbers in this fashion. in support of his position, the plaintiff argues that at some time almost all citizens of the state apply for some form of state benefit, and that the compilation of a central file on each citizen of the state is likely to have a chilling effect on the exercise of rights granted by the first amendment to the united states constitution.