NIST requests comments on Federal Information Processing Standard (FIPS) 186-4, Digital Signature Standard, which has been in effect since July 2013. FIPS 186-4 specifies three techniques for the generation and verification of digital signatures that can be used for the protection of data: the Rivest-Shamir-Adleman Algorithm (RSA), the Digital Signature Algorithm (DSA), and the Elliptic Curve Digital Signature Algorithm (ECDSA), along with a set of elliptic curves recommended for government use. NIST is primarily seeking comments on the recommended elliptic curves specified in Appendix D of the FIPS, but comments on other areas of the FIPS will also be considered.