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An extranet lets an organisation share part of its information system (e.g. documents, services, computer etc.) securely over the Internet. In-house data is available to suppliers, customers, or external partners. Security is critical, but it must not impede upon effective business relationships. Exchanges should comply with an agreed security policy, but no generally accepted solution exists to achieve this. The SEVA framework deals with these issues and this paper describes the SEVA architecture. A typical scenario of operation of a SEVA extranet is provided in this paper.
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