“DSS is the proposed Digital Signature Standard, which specifies a Digital Signature Algorithm (DSA), and is a part of the U.S. government's Capstone project. It was selected by NIST, in cooperation with the NSA, to be the digital authentication standard of the U.S. government; whether the government should in fact adopt it as the official standard is still under debate. DSS is based on the discrete log problem and derives from cryptosystems proposed by Schnorr and ElGamal. It is for authentication only.” (http://www.qualix.com/html/cstone.html)