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: RSA, DSA, and 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. FIPS 186-4 is available at https://federalregister.gov/a/2015-26539.
The Federal Register Notice (https://federalregister.gov/a/2015-26539) provides additional background information, including questions that NIST is especially interested in having addressed.