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Students of Communication, study E-Commerce as an auxiliary subject. these are the key points discussed in these Lecture Slides of E-Commerce : Business Connectivity, Options, Solutions, Mixed Solution, Full Outsourcing, Maintenance, Keep Servers, Front Investment, Low Risk, Extranet
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Electronic Commerce (WS-02/03) 3-
Net Net Remote maintenance
Electronic Commerce (WS-02/03) 3-
Why an intranet is not sufficient: o A company that has several local branches or has field staff needs to provide access to its intranet to externals. Furthermore, a company may want to provide access to internal information to its business associates. Example: Boeing subcontractors must allow Boeing access to their workflow systems for inter-organizational workflows. Solution: Creating an extranet. Definition Intranet : Computers inside a company that are connected via internet- based protocols (HTML: HTTP, FTP, Mail: SMTP, POP3) and are not accessible from outside. A company‘s extranet provides secured access to its intranet and to additional information and services that may not be part of its intranet. Access to the extranet is secured via a firewall. Definition
Electronic Commerce (WS-02/03) 3-
Classification [Merz99] tender catalogs, pricing lists, terms and conditions, product information, distribution information, XML / EDI Employment lists, document repositories, administrative data Marketing information, Product information Data exchange Mailing lists, inter- organizational workflows. knowledge management Mailing lists, groupware, workflow systems, knowledge management systems Mailing lists, Chat, Search Engines, Online- Community services Authentication, authorization, non-repudiation (traceability) Authentication, Authorization No authentication, no authorization Security employees, business associates, subcontractors Predominant public, customers^ employees use for: Access to the Internet Intranet Extranet company‘s network
Electronic Commerce (WS-02/03) 3-
VPNs are used to o connect a company‘s extranet with its field staff over the internet. Data transfer is encrypted, access requires authentication. o connect several companies‘ extranets over the Internet. Requirements o Security measures for the extranet o Encrypted data exchange NOTE: In a VPN with several parties involved, every two companies will want to create a VPN on their own. In this case, a public key infrastructure (PKI) becomes useful. For Public Key Infrastructure (PKI) see later chapters A Virtual Private Network is a network that is constructed by using public wires (the Internet) to connect network nodes, such as distributed enterprise departments, etc. VPNs use encryption and other security mechanisms at their borders to ensure that only authorized users can access the network and that the data cannot be intercepted. Definition [Web00]
Electronic Commerce (WS-02/03) 3-
Realizations of a VPN: by Black boxes: Devices that are plugged between computer systems and LAN connection.
