NIST is pleased to announce the approval of FIPS 186-4, the Digital Signature Standard. This Standard specifies three techniques for the generation and verification of digital signatures that can be used for the protection of data: DSA, ECDSA and 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. FIPS 186-4 is available at
http://csrc.nist.gov/publications/PubsFIPS.html .