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Resource allocation for security services in mobile cloud computing

Resource allocation for security services in mobile cloud co...

引用

IEEE Conference on Computer Communications Workshops, INFOCOM Wksps

作者： Hongbin Liang Dijiang Huang Lin X. Cai Xuemin Shen Daiyuan Peng Department of Electrical and Computer Engineering University of Waterloo Canada School of Information Science and Technology Southwest Jiaotong University China School of Computing Informatics and Decision Systems Engineering Arizona State University USA

ISBN: (纸本)9781457702495

Mobile cloud is a machine-to-machine service model, where a mobile device can use the cloud for searching, data mining, and multimedia processing. To protect the processed data, security services, i.e., encryption, decryption, authentications, etc., are performed in the cloud. In general, we can classify cloud security services in two categories: Critical Security (CS) service and Normal Security (NS) service. CS service provides strong security protection such as using longer key size, strict security access policies, isolations for protecting data, and so on. The CS service usually occupies more cloud computing resources, however it generates more rewards to the cloud provider since the CS service users need to pay more for using the CS service. With the increase of the number of CS and NS service users, it is important to allocate the cloud resource to maximize the system rewards with the considerations of the cloud resource consumption and incomes generated from cloud users. To address this issue, we propose a Security Service Admission Model (SSAM) based on Semi-Markov Decision Process to model the system reward for the cloud provider. We, first, define system states by a tuple represented by the numbers of cloud users and their associated security service categories, and current event type (i.e., arrival or departure).We then derive the system steady-state probability and service request blocking probability by using the proposed SSAM. Numerical results show that the obtained theoretic probabilities are consistent with our simulation results.

关键词： Mobile communication Computational modeling Cloud computing Resource management Mobile handsets Authentication

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Cloud testing tools

Cloud testing tools

引用

6th IEEE International Symposium on Service-Oriented System engineering, SOSE 2011

作者： Bai, Xiaoying Li, Muyang Chen, Bin Tsai, Wei-Tek Gao, Jerry Department of Computer Science and Technology TNList Tsinghua University Beijing China SKLSDE Beijing University of Aeronautics and Astronautics Beijing China School of Computing Informatics and Decision Systems Engineering Arizona State University United States Department of Computer Science and Technology San Jose State University United States

ISBN: (纸本)9781467304108

Cloud platform provides an infrastructure for resource sharing, software hosting and service delivering in a pay-per-use approach. To test the cloud-based software systems, techniques and tools are necessary to address unique quality concerns of the cloud infrastructure such as massive scalability and dynamic configuration. The tools can also be built on the cloud platform to benefit from virtualized platform and services, massive resources, and parallelized execution. The paper makes a survey of representative approaches and typical tools for cloud testing. It identifies the needs for cloud testing tools including multi-layer testing, SLA-based testing, large scale simulation, and on-demand test environment. To address the needs, it investigates the new architecture and techniques for designing testing tools for the cloud and in the cloud. Tool implementations are surveyed considering different approaches including migrated conventional tools, research tools, commercial tools and facilities like benchmark and testbed. Based on the analysis of state-of-the-art practices, the paper further investigates future trend of testing tool research and development from both capability and usability perspectives. © 2011 IEEE.

关键词： Surveys

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Services utility prediction on a cloud

Services utility prediction on a cloud

引用

IEEE International Conference on Service-Oriented computing and Applications (SOCA)

作者： Wei-Tek Tsai Peide Zhong Janaka Balasooriya Yinong Chen Xiaoying Bai Department ofComputer Science and Technology Department Tsinghua University Beijing China School of Computing Informatics and System Engineering Arizona State University Tempe USA

Cloud computing and Software-as-a-Service (SaaS) are being widely applied. In the near future, there will be many cloud services providing similar services. One of the issues is to dispatch service requests to available services dynamically so that service requests can be served in the most effective and efficient way. This paper proposes an algorithm that efficiently serves requests for services by predicting the number of services needed. Furthermore, a cloud architectural framework to support the algorithm and prediction model is introduced. The paper also presents a simulation study to validate the algorithm proposed.

关键词： Prediction algorithms Predictive models Computational modeling Cloud computing Schedules Algorithm design and analysis Mathematical model

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Provably secure role-based encryption with revocation mechanism

Provably secure role-based encryption with revocation mechan...

引用

作者： Zhu, Yan Hu, Hong-Xin Ahn, Gail-Joon Wang, Huai-Xi Wang, Shan-Biao Institute of Computer Science and Technology Peking University Beijing 100871 China Beijing Key Laboratory of Internet Security Technology Peking University Beijing 100871 China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ 85287 United States 4School of Mathematical Sciences Peking University Beijing 100871 China

Role-Based Encryption (RBE) realizes access control mechanisms over encrypted data according to the widely adopted hierarchical RBAC model. In this paper, we present a practical RBE scheme with revocation mechanism based on partial-order key hierarchy with respect to the public key infrastructure, in which each user is assigned with a unique private-key to support user identification, and each role corresponds to a public group-key that is used to encrypt data. Based on this key hierarchy structure, our RBE scheme allows a sender to directly specify a role for encrypting data, which can be decrypted by all senior roles, as well as to revoke any subgroup of users and roles. We give a full proof of security of our scheme against hierarchical collusion attacks. In contrast to the existing solutions for encrypted file systems, our scheme not only supports dynamic joining and revoking users, but also has shorter ciphertexts and constant-size decryption keys. © 2011 Springer Science+Business Media, LLC & Science Press, China.

关键词： Access control

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An Approach for Service Composition and Testing for Cloud computing

An Approach for Service Composition and Testing for Cloud Co...

引用

International Symposium on Autonomous Decentralized Systems (ISADAS)

作者： Wei-Tek Tsai Peide Zhong Janaka Balasooriya Yinong Chen Xiaoying Bai Jay Elston Department of Computer Science and Technology Tsinghua University Beijing China School of Computing Informatics and Decision System Engineering Arizona State University Tempe AZ USA

As cloud services proliferate, it becomes difficult to facilitate service composition and testing in clouds. In traditional service-oriented computing, service composition and testing are carried out independently. This paper proposes a new approach to manage services on the cloud so that it can facilitate service composition and testing. The paper uses service implementation selection to facilitate service composition similar to Google's Guice and Spring tools, and apply the group testing technique to identify the oracle, and use the established oracle to perform continuous testing for new services or compositions. The paper extends the existing concept of template based service composition and focus on testing the same workflow of service composition. In addition, all these testing processes can be executed in parallel, and the paper illustrates how to apply service-level MapReduce technique to accelerate the testing process.

关键词： Testing Ontologies Companies Silicon Cloud computing Software Programming

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Usability Evaluation of a Prototype iPhone App for Osaka Castle Museum: Outcomes and Reflections

Usability Evaluation of a Prototype iPhone App for Osaka Cas...

引用

12th International Symposium on Virtual Reality, Archaeology, and Cultural Heritage, VAST 2011

作者： Carillo, E. Chikama, M. Kadobayashi, R. Shimojo, S. Pemberton, L. Rodriguez-Echavarria, K. Arnold, D. Cultural Informatics Research Group School of Computing Engineering and Mathematics University of Brighton Brighton United Kingdom Knowledge Creating Communication Research Center National Institute of Information and Communications Technology Kyoto Japan Network Testbed Research Promotion Group National Institute of Information and Communications Technology Kyoto Japan Department of Digital Games Faculty of Information Science and Arts Osaka Electro-Communication University Osaka Japan Interactive Technologies Research Group School of Computing Engineering and Mathematics University of Brighton Brighton United Kingdom

ISBN: (纸本)9783905673869

The evaluation of the effectiveness of new technologies for cultural heritage is becoming increasingly relevant, as the number of tools and media for public presentation grows rapidly across the world. Amongst these technologies, smartphone applications are rapidly increasing, with museums releasing new Apps at an incredible pace. It is therefore important to understand how these Apps are re-shaping the behaviour of museums' visitors and the approach of heritage professionals. This paper presents the outcomes of a user evaluation of a prototype iPhone App developed for Osaka Castle Museum in Japan. It reports on the methodology adopted and the results gathered, but it also reflects on implications and cultural issues. © The Eurographics Association 2011.

关键词： Museums

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P4-SimSaaS: Policy specification for multi-tendency simulation Software-as-a-Service model 11

P4-SimSaaS: Policy specification for multi-tendency simulati...

引用

Simulation Winter Conference

作者： Wei-Tek Tsai Wu Li Xiaoying Bai Jay Elston School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ USA Department of Computer Science and Technology Tsinghua University Beijing China

Simulation can benefit from cloud computing that often comes with thousands of processors and its soft-ware is structured as Software-as-a-Service (SaaS) with its Multi-Tenancy Architecture (MTA). To sup-port multiple tenants, simulation SaaS models need be modeled and customized to fulfill the various functional and quality requirements of individual tenants. The multitude options of tenant-specific data have made the simulation models and execution processes rather complicated. This paper presents P4-SimSaaS that comes with an new ontology system and an innovative tenant related policy specification for Simulation SaaS. P4-SimSaaS can reduce the complexity in the MTA simulation models and consequently increase the flexibility in MTA simulation execution environment. A case study is offered to demonstrate the entire framework.

关键词： Ontologies Buildings Solid modeling Computational modeling Educational institutions Data models

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An Ontology-Based Approach to Adaptive Home Careflows

An Ontology-Based Approach to Adaptive Home Careflows

引用

International Workshop on Database and Expert Systems Applications

作者： Abdel-Rahman Hani Tawil Anousak Litnhouvongs Quentin Chevalier Adel Taweel School of Architecture Computing & Engineering University of East London UK ISIS Engineering School in Health Information Systems Champollion University Castres France Department of Informatics/Public Health Sciences Kings College London UK

In the healthcare domain, a profusion of workflows are utilised and lots of implicit knowledge is used by domain experts in their daily activities. Ontologies can facilitate the personalized construction of care workflows (care flows) and guide their management in contingency cases, thus allowing them to deviate from their standard prescribed static definition. In this paper we propose a formalization of workflow to automatically adapt the process of homecare for elderly people. We use an ontology of Business Process Modeling Notations(BPMN) associated with both Actor and Case Profile Ontologies to dynamically build flexible care flows capable of guiding the continuity of care.

关键词： Ontologies Adaptation models Business OWL Diseases Senior citizens

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Service Replication Strategies with MapReduce in Clouds

Service Replication Strategies with MapReduce in Clouds

引用

International Symposium on Autonomous Decentralized Systems (ISADAS)

作者： Wei-Tek Tsai Peide Zhong Jay Elston Xiaoying Bai Yinong Chen Department of Computer Science and Technology Tsinghua University Beijing China School of Computing Informatics and Decision System Engineering Arizona State University Tempe AZ USA

The current implementations of cloud environment do not have suitable mechanism through which services can be managed to make use of cloud resources. The services in these environments can passively serve users' request only. If a service receives more requests than it can handle in a certain time period, it is subject to malfunctioning. This paper proposes a new approach to service replications that allows a cloud to adjust its service instance deployments in response to existing and projected service request loads. This approach defines an optimal service replication strategy based on MapReduce, a processing model used extensively in GAE (Google App Engine) to solve huge data processing tasks. This service replication strategy is implemented by Service Level MapReduce (SLMR). To better support for SLMR, service replication technology is introduced, which include dynamic service replication and pre-deployed service replication. Furthermore, a passive SLMR approach that depends on the cloud management service (CMS) and a positive SLMR approach that does not need the support from CMS will be introduced.

关键词： Cloud computing Servers Computer architecture Google Timing Speech recognition Dispatching

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Testing the scalability of SaaS applications

Testing the scalability of SaaS applications

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IEEE International Conference on Service-Oriented computing and Applications (SOCA)

作者： Wei-Tek Tsai Yu Huang Qihong Shao Department of Computer Science and Technology Tsinghua University Beijing China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ USA

Cloud computing and SaaS (Software-as-a-Service) received significant attention recently. Testing SaaS applications is important because many mission-critical applications will be deployed on the cloud. However, to the best of our knowledge, testing framework designed specifically for SaaS applications is not developed. The issue of testing the scalability of SaaS applications remains untouched. This paper discusses the unique features and challenges in testing SaaS applications, and proposes scalability metrics that can be used to test the scalability of SaaS applications.

关键词： Scalability Testing Measurement Cloud computing Program processors Sun

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