In SOA environment, a software application is a composition of services, which are scattered across the Internet. Security plays a vital role during the design, development and operation of SOA applications. However, analysis of todays software development approaches reveals that the engineering of security into the system design is often neglected. Security is incorporated in an ad-hoc manner or integrated during the applications development phase or administration phase or out sourced. General purpose modeling languages like UML are used for designing the software system; however, these...