; and (v) to 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 issue, after publication in the Federal Register and an opportunity for public comment, a final rule establishing a process by 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, will be blocked from use in the System unless an individual using such a number establishes, through secure and fair procedures, that the individual is the legitimate holder of such number. (ii) Continuation of existing self lock system During the period in which the Commissioner of Social Security is developing the process required under clause (i), the Commissioner shall maintain the Self Lock system that permits individuals to prevent unauthorized users from using their Social Security account numbers to confirm employment authorization through E–Verify. (iii) Notice If the Secretary blocks or suspends a Social Security account number pursuant to 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 additional security measures to adequately verify the identity of an individual whose identity may not be verified using the photo matching tool described in subparagraph (A). Such additional security measures shall be— (i) kept up-to-date with technological advances