Privacy-preserved security-conscious framework to enhance web service composition

The emergence of loosely coupled and platform-independent Service-Oriented Computing (SOC) has encouraged the development of large computing infrastructures like the Internet, thus enabling organizations to share information and offer valueadded services tailored to a wide range of user needs. Web Service Composition (WSC) has a pivotal role in realizing the vision of implementing just about any complex business processes. Although service composition assures cost-effective means of integrating applications over the Internet, it remains a significant challenge from various perspectives. Security and privacy are among the barriers preventing a more extensive application of WSC. First, users possess limited prior knowledge of security concepts. Second, WSC is hindered by having to identify the security required to protect critical user information. Therefore, the security available to users is usually not in accordance with their requirements. Moreover, the correlation between user input and orchestration architecture model is neglected in WSC with respect to selecting a high performance composition execution process. The proposed framework provides not only the opportunity to securely select services for use in the composition process but also handles service users’ privacy requirements. All possible user input states are modelled with respect to the extracted user privacy preferences and security requirements. The proposed approach supports the mathematical modelling of centralized and decentralized orchestration regarding service provider privacy and security policies. The output is then utilized to compare and screen the candidate composition routes and to select the most secure composition route based on user requests. The D-optimal design is employed to select the best subset of all possible experiments and optimize the security conscious of privacy-preserving service composition. A Choreography Index Table (CIT) is constructed for selecting a suitable orchestration model for each user input and to recommend the selected model to the choreographed level. Results are promising that indicate the proposed framework can enhance the choreographed level of the Web service composition process in making adequate decisions to respond to user requests in terms of higher security and privacy. Moreover, the results reflect a significant value compared to conventional WSC, and WSC optimality was increased by an average of 50% using the proposed CIT

Research Article Novel Security Conscious Evaluation Criteria for Web Service Composition

Abstract: This study aims to present a new mathematical based evaluation method for service composition with respects to security aspects. Web service composition as complex problem solver in service computing has become one of the recent challenging issues in today's web environment. It makes a new added value service through combination of available basic services to address the problem requirements. Despite the importance of service composition in service computing, security issues have not been addressed in this area. Considering the dazzling growth of number of service based transactions, making a secure composite service from candidate services with different security concerns is a demanding task. To deal with this challenge, different techniques have been employed which have direct impacts on secure service composition efficiency. Nonetheless, little work has been dedicated to deeply investigate those impacts on service composition outperformance. Therefore, the focus of this study is to evaluate the existing approaches based on their applied techniques and QoS aspects. A mathematicalbased security-aware evaluation framework is proposed wherein Analytic Hierarchy Process (AHP), a multiple criteria decision making technique, is adopted. The proposed framework is tested on state-of-the-art approaches and the statistical analysis of the results presents the efficiency and correctness of the proposed work

Development of an access control model for web services applying XML-based approach

Web Services is a raising model of Web based applications, which allows interconnection, communication, and interoperability among different devices and applications more convenient. Since web services applications run over the open and unreliable internet, security for web services is a necessity and should be applied to provide services providers and service requestors with quality of protection. With the intention to protect resources and information from unlawful access, access control systems are built to provide protection. In spite of the recent advances in Web based access control approaches applicable to Web Services, there remain issues that obstruct the development of effective access control models for Web Services environment. In this project, a secured model for Web Services to provide an effective Access Control model through strong authentication and authorization has been developed. Moreover, in order to demonstrate the proposed model design, the prototype applying a case study is illustrate

An enhanced heuristic XoR network coding-based method for high quality video streaming over VANETs.

One of the most important challenges in live video streaming in mobile vehicular networks is the optimal use of broadband and point-to-point packet delay. Recent studies show that the sheer use of frames flow compression methods (such as H.264 or HEVC) and the proper communication overlay, such as Peer-to-Peer (P2P), has no absolute influence on increasing the quality of received video in VANET networks. Therefore, the use of an appropriate data exchange method, such as network coding, seems to be of great importance. Compared to Random Network Coding (RNC), XoR Network Coding (XNC) method has the least computational load for the network which is an important factor in optimal use of limited energy of nodes in a wireless network. The basic problem in XNC is that when a node is supposed to combine several frames and transmit them through an encoded frame, how this combination could be made to enable other nodes of the network to be broadcasted through receiving this packet and how can the available packets in their buffers decode as well as extract the largest number of frames in order to experience a higher video quality. To fulfil this aim, an encoding intelligent method is required which is based on the buffers' status of neighbours. In the proposed method in this article, the best frame combination is reached through buffers status of neighbours and AHP methods or AHP-TOPSIS methods, and the encoded frames are broadcasted through XNC. Simulation results show that due to the reduction in number of transmitted packets in the network, parameters such as congestion and point-to-point delay are significantly reduced and vehicles experience a higher video quality compared with other similar methods

QoS-aware evaluation criteria for web service composition

Service composition is becoming increasingly pervasive, affecting the way service computing is utilized. Service composition has become an essential element of service deployment due to the fact that single services are unable to fulfill user requirements. Owing to the dramatic growth of services claiming similar functionalities, creating a value-added composite service from a number of candidate services to address the desired goals is a challenging task. To overcome this challenge, various Quality of Service (QoS) aware Web Service Composition (WSC) approaches have been implemented and have a significant impact on composition efficiency. However, there is a lack of knowledge on the impact of such approaches on service composition processes. Hence, this study is aimed to evaluate existing approaches based on QoS aspects. A mathematical-based QoS-aware evaluation framework is proposed and tested on the state-of-the-art approaches. The criteria used for evaluation are first identified from a comprehensive review of related literature. Multi Criteria Decision Making technique is applied in order to formulate a new QoS-aware evaluation method for Web Service Composition approaches based on the identified criteria. The approaches are evaluated using the proposed method to prove its applicability and correctness. The results demonstrate how a service composition approach addresses QoS aspects and assists researchers in outperforming their service composition solutions. The statistical results show the efficiency and correctness of the evaluation method