; (iv) suspend or limit the use of the individual’s social security account number or other personally identifying information for purposes of the System; and (v) provide notice to the Department of Homeland Security of any suspected identity fraud or other improper use of personally identifying information. (C) Blocking misused social security account numbers (i) In general The Secretary, in consultation with the Commissioner of Social Security (referred to in this section as the Commissioner ), shall develop, after publication in the Federal Register and an opportunity for public comment, a process in which social security account numbers that have been identified to be subject to unusual multiple use in the System or that are otherwise suspected or determined to have been compromised by identity fraud or other misuse, shall be blocked from use in the System unless the individual using such number is able to establish, through secure and fair procedures, that the individual is the legitimate holder of the number. (ii) Notice If the Secretary blocks or suspends a social security account number under this subparagraph, the Secretary shall provide notice to the persons or entities that have made inquiries to the System using such account number that the identity and employment authorization of the individual who provided such account number must be re-verified. (D) Additional identity authentication tool The Secretary shall develop, after publication in the Federal Register and an opportunity for public comment, additional security measures to adequately verify the identity of an individual whose identity may not be verified using the photo tool described in subparagraph (A). Such additional security measures— (i) shall be kept up to date with technological advances