The document discusses trust services that are fundamental for digital business transactions, including authentication, authorization, and non-repudiation. It notes that traditional authentication techniques do not meet the requirements of digital business and outlines cryptographic protocols like digital signatures that can provide persistent authentication of electronic documents and identities. However, it states that non-repudiation requires additional legal and policy frameworks beyond authentication alone. The document also examines authorization services and their implementation in web environments.

1. Trust in E- and M-Business Advances Through IT-Security SACIS Conference 2002 Istanbul, March 19-20

18. Authorization in the Web Environment: Common Architecture PSTN IP network PSTN Intranet Home, hotel ,... Office Mobile ... Target services Clients Internet connectivity External networks Internal networks Policy enforcement point Policy decision point Repository Policy administration point