This Law Firm Publication by Jackson Lewis LLP discusses New York's new law safeguarding Social Security Numbers (SSN). Under Section 399-ddd of New York’s General Business Law, effective December 12, 2012, a person may not be required to disclose or furnish his SSN for any purpose. The new law applies to employers and certain other entities in the state. Businesses must review their practices relating to employees, customers and other individuals in situations where all or a part of the SSN is involved. An SSN includes not only the nine-digit number issued by the Social Security Administration, but also any number derived from the SSN, unless the number is encrypted.