English

Abstract

The Service Oriented Architecture using ISO Reference Model for Open Distributed Processing is a high performance technique for providing effective services to the users. This architecture consists of five different viewpoints namely Enterprise viewpoint, Computational viewpoint, Information viewpoint, Engineering viewpoint and Technology viewpoint. This paper discusses the details about the Computational viewpoint. Computational viewpoint defines the functional decomposition of the system into a set of services that interact at interfaces. These services can be found in a security system and present as classification based on the functionality of services. Interaction between the service requester and the security system, and the communication between the security system and the service provider is carried out through external messages. The security system receives an input message then processes it and produces an output message. The semantics of the message is the issue of information view point. If the security check fails or if the processing logic can’t be correctly applied, security services can raise exceptions signalling that the errors encountered. Exception message contain annotations and other meta-information