International Research Association of Computer Science and Technology (IRACST)
The buzz word \"Service Oriented Architecture\" (SOA) leads to increase in operational efficiency and improved flexibility through the reuse of the services. Security for the services requires orchestration as one of their minimum and basic requirements. The orchestration is an extremely important mechanism or phenomenon that is capable of initiating the services to work and provide the control. The important feature of orchestration is initiation and coordination with different services. This coordination is obtained by parallel composition and choices.