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In cloud computing, security is an important issue due to the increasing scale of users. Current approaches to access control on clouds do not scale well to multi-tenancy requirements because they are mostly based on individual user IDs at different granularity levels. However, the number of users can be enormous and causes significant overhead in managing security. RBAC (Role-Based Access Control)...
Software as a Service (SaaS) with multi-tenancy architecture is a popular approach. To support a significant number of tenants, SaaS applications need be customizable to fulfill the various functional and quality requirements of individual tenants. This paper presents a unified and innovative multi-layered customization framework, to support and manage the variability of SaaS applications and tenants-specific...
As smart home environment gets more and more diverse with newly evolved devices and applications, instead of programming each household, there is a need for a knowledge-based framework to facilitate the automatic composition of appropriate services. The framework should address the issues of finding suitable devices automatically, composing feasible plans, and making the composed plans executable...
This paper presents a novel information sharing framework using Service-Oriented Database System (SODB) for service registry and repository that facilitates data integration. A SODB is a database architecture composed with reusable services to support searching, querying, deleting, and storing data. As SODB is organized in a service-oriented manner, SODB can be easily changed or maintained by reusing...
Building information model (BIM) encompasses building geometry, spatial relationships, geographic information, and quantities and properties of building components; however, it does not include any information related to the functions that a building might require. On the other side, service-oriented computing emerged as a promising technology to enable fast, efficient software development. Even though...
Given the diversity of home environment, appliances, and residents, the applications for smart homes must be configurable and adaptive. Instead of programming each household, we propose an ontology-based framework to facilitate the automatic composition of appropriate applications. The system composes appropriate services depending upon the available equipments in each individual household automatically...
This paper proposes dynamic and adaptive reliability methods that can be integrated into a collaborative composition framework with dynamic verification and adaptive reliability modeling. The composition process follows a template-based approach with ontology systems where a variety of items can be reused including services, workflows, application templates, and test cases/scripts. Items submitted...
Testing is useful to establish trust between service providers and clients. To test the service-oriented applications, automated and specification-based test generation and test collaboration are necessary. The paper proposes an ontology-based approach for Web services (WS) testing. A test ontology model (TOM) is defined to specify the test concepts, relationships, and semantics from two aspects:...
High assurance systems have evolving requirements and, hence, the definition for assurance requirements should allow evolution. We recommend the use of ontology to capture such evolving requirements. In this paper, we introduce the concept of trustworthiness to include dependability and some additional high assurance attributes. We develop an ontology of trustworthiness aspects and an ontology of...
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