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Validity and accuracy issues in electronic commerce with specific reference to VPN's

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dc.contributor.advisor Prof. Anton du Toit en_US
dc.contributor.author De Bruin, Werner
dc.date.accessioned 2012-08-13T07:47:59Z
dc.date.available 2012-08-13T07:47:59Z
dc.date.issued 2012-08-13
dc.date.submitted 1997
dc.identifier.uri http://hdl.handle.net/10210/5494
dc.description M.Comm. en_US
dc.description.abstract Business have traditionally relied on private leased lines to link remote office together so that distant workers could share information over a Wide Area Network (WAN). However, while providing a high degree of privacy, leased lines are expensive to set up and maintain. The Internet is fast becoming a requirement for supporting business operations in the global economy. The major concern in using a public network, like the Internet, for data exchange is the lack of security. The Internet was designed to be an "open" network, accessible to anyone with low or none security consideration. Virtual Private Networks (VPN) using Point-to-Point Tunneling Protocol (PPTP) has emerged as a relatively inexpensive way to solve this problem. The primary objective of this dissertation is to evaluate validity and accuracy issues in electronic commerce using VPN as a secure medium for data communication and transport over the Internet. The inherent control features of PPTP were mapped to data communication control objectives and the control models show how these address validity, completeness and accuracy. After analysing and evaluating the inherent control features of PPTP, the overall result is that: PPTP enables a valid communication link to be established with restricted access (validity); the PPTP communication link remains private for the full time of the connection (validity); data can be sent accurately and completely over the PPTP connection and remains accurate during transmission (accuracy); and all data sent is completely received by the receiver (accuracy). By deploying a Point-to-Point Tunneling Protocol for virtual private networking, management can mitigate the risk of transmitting private company and business data over the Internet. The PPTP analysis and evaluation models developed intend to give the auditor a control framework to apply in practice. If the auditor needs to perform a data communication review and finds that a virtual private network has been established using PPTP, the control models can assist in providing knowledge and audit evidence regarding validity and accuracy issues. The auditor should however, not review PPTP in isolation. Validity and accuracy control features inherent to TCP/IP and PPP should also be considered as well as controls on higher levels, e.g. built-in application controls. en_US
dc.language.iso en en_US
dc.subject Electronic commerce-Security measures. en_US
dc.subject Extranets (Computer networks) en_US
dc.subject Electronic commerce-Auditing. en_US
dc.subject Virtual Private Networks en_US
dc.subject Point-to-Point Tunneling Protocol en_US
dc.title Validity and accuracy issues in electronic commerce with specific reference to VPN's en_US
dc.type Thesis en_US


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