title: an anonymous electronic commerce scheme with an off-line authority and untrusted agents josep domingo-ferrer , jordi herrera-joancomartí sigmod record. authors: nan. venue: nan. year: 1998.0
title: an anonymous electronic commerce scheme with an off-line authority and untrusted agents. authors: josep domingo-ferrer , jordi herrera-joancomart &#237;. venue: acm sigmod record. year: 1998.0