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...E commerce concepts and application design course designer acquisition editor centre for information technology engineering manonmaniam sundaranar university tirunelveli contents lecture what is electronic benefits of various services types direct marketing selling supply chain integration corporate procurement data interchange major projects in applications value purchasing financial examples today s on line web home banking service customer technical support internet www tools mail news groups ftp telnet wais gopher agent the model commercial transactions cash payment schemes monetary security requirements confidentiality integrity account holder merchant authentication interoperability purchase order process registration ordering authorization problems with simple creating anonymity preventing double spending netscape microsoft check free cyber verisign digicash netcash netbill joint initiative jepi threats cryptography symmetric encryption a comparison digital signatures certificat...