This notice announces the Secretary of Commerce's approval of Federal Information Processing Standard (FIPS) 186-4, Digital Signature Standard (DSS). FIPS 186-4 specifies three techniques for the generation and verification of digital signatures that can be used for the protection of data: The Digital Signature Algorithm (DSA), the Elliptic Curve Digital Signature Algorithm (ECDSA) and the Rivest-Shamir Adelman Algorithm (RSA). This revision includes a clarification of terms, a reduction of restrictions on the use of random number generators and the retention and use of prime number generation seeds, a correction of wording and typographical errors, and further aligns the FIPS with Key Cryptography Standard (PKCS) #1.