Certificate Authority Trusted Third par Registration Certification Authority Authority Generates Certificate Approves Certificate Sign the Certifcate Issuance User Applyfor Certificate
Certificate Authority - Trusted Third Party Certification Authority User A A • Apply for Certificate • CA should be trusted by everybody Registration Authority • Approves Certificate Issuance • Generates Certificate • Sign the Certifcate
EXAMPLE of e-services A fair, dynamic matching system Schools Students
EXAMPLE of e-services - A fair, dynamic matching system Schools Students
Computing Paradigms Penetration Utility Computing. Appliances Utilities Cooperative Computing n° Internet& Networked WWW Personal Computing Clients servers Distributed Batch Computing Micros Computing Ti mesharIng Mainframes 1960 1970 1980 1990 2000 Time
Computing Paradigms Time 1960 1970 1980 1990 2000 Penetration Batch Computing & Timesharing Distributed Computing Networked Personal Computing Cooperative Computing Mainframes Minis Micros Clients & Servers Utility Computing Appliances & Utilities Internet & WWW
The Basic Economic model 2 Manufacturers Wholesalers Retailers Consumers Governments Transportation Communications Banks
The Basic Economic Model Governments Transportation Banks Manufacturers Wholesalers Retailers Consumers Communications
B2B VS B2C E-Commerce ≌EO 2 Manufacturers Wholesalers Retailers Consumers ∽s B2C E-Commerce Governments Transportation Communications Banks B2B E-Commerce
B2B vs. B2C E-Commerce Consumers Governments Transportation Banks Manufacturers Wholesalers Retailers B2C E-Commerce B2B E-Commerce Communications