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商品描述
This book includes a study of trustworthiness, percentile response time, service availability, and authentication in the networks between users and cloud service providers, and at service stations or sites that may be owned by different service providers. The first part of the book contains an analysis of percentile response time, which is one of the most important SLA (service level agreements) metrics. Effective and accurate numerical solutions for the calculation of the percentile response time in single-class and multi-class queueing networks are obtained. Then, the numerical solution is incorporated in a resource allocation problem. Specifically, the authors present an approach for the resource optimization that minimizes the total cost of computer resources required while preserving a given percentile of the response time. In the second part, the approach is extended to consider trustworthiness, service availability, and the percentile of response time in Web services. These QoS metrics are clearly defined and their quantitative analysis provided. The authors then take into account these QoS metrics in a trust-based resource allocation problem in which a set of cloud computing resources is used by a service provider to host a typical Web services application for single-class customer services and multipleclass customer services respectively. Finally, in the third part of the book a thorough performance evaluation of two notable public key cryptography-based authentication techniques; Public-Key Cross Realm Authentication in Kerberos (PKCROSS) and Public Key Utilizing Tickets for Application Servers (PKTAPP, a.k.a. KX.509/KCA); is given, in terms of computational and communication times. The authors then demonstrate their performance difference using queuing networks. PKTAPP has been proposed to address the scalability issue of PKCROSS. However, their in-depth analysis of these two techniques shows that PKTAPP does not perform better than PKCROSS in a large-scale system. Thus, they propose a new public key cryptography-based group authentication technique. The performance analysis demonstrates that the new technique can scale better than PKCORSS and PKTAPP.
商品描述(中文翻譯)
本書探討了用戶與雲服務提供商之間的信任度、百分位響應時間、服務可用性以及在可能由不同服務提供商擁有的服務站或網站上的身份驗證。書的第一部分包含對百分位響應時間的分析，這是最重要的服務水平協議（SLA）指標之一。針對單類別和多類別排隊網絡中百分位響應時間的計算，獲得了有效且準確的數值解。接著，將數值解納入資源分配問題中。具體而言，作者提出了一種資源優化的方法，旨在最小化所需計算資源的總成本，同時保持給定的響應時間百分位。在第二部分中，該方法擴展到考慮Web服務中的信任度、服務可用性和響應時間的百分位。這些服務質量（QoS）指標被明確定義，並提供了其定量分析。然後，作者在基於信任的資源分配問題中考慮這些QoS指標，其中一組雲計算資源被服務提供商用來分別為單類別客戶服務和多類別客戶服務托管典型的Web服務應用程序。最後，在書的第三部分，對兩種顯著的基於公鑰密碼學的身份驗證技術進行了徹底的性能評估；即Kerberos中的公鑰跨域身份驗證（PKCROSS）和用於應用伺服器的公鑰票證（PKTAPP，亦稱KX.509/KCA），從計算和通信時間的角度進行評估。作者接著使用排隊網絡展示了它們的性能差異。PKTAPP被提出以解決PKCROSS的可擴展性問題。然而，對這兩種技術的深入分析顯示，PKTAPP在大規模系統中並不比PKCROSS表現更佳。因此，他們提出了一種新的基於公鑰密碼學的群體身份驗證技術。性能分析顯示，這種新技術的可擴展性優於PKCROSS和PKTAPP。
