Certification and security in e-services : from e-government to e-business : IFIP 17th World Computer Congress TC11 stream on security in e-services, August 26-29, 2002, Montréal, Québec, Canada / edited by Enrico Nardelli, Sabina Posadziejewski, Maurizio Talamo. - Nardelli, Enrico; Posadziejewski, Sabina; Talamo, Maurizio (Kluwer Academic Publishers, 2003)