@MASTERSTHESIS\{IMM2011-06152, author = "N. Miotto", title = "Trustworthiness in Service Oriented Computing", year = "2011", school = "Technical University of Denmark, {DTU} Informatics, {E-}mail: reception@imm.dtu.dk", address = "Asmussens Alle, Building 305, {DK-}2800 Kgs. Lyngby, Denmark", type = "", note = "Supervised by Associate Professor Nicola Dragoni, ndra@imm.dtu.dk, {DTU} Informatics", url = "http://www.imm.dtu.dk/English.aspx", abstract = "Service Oriented Computing is an emerging paradigm for distributed computing, where Web Services represent the bricks of Service Oriented Architecture. Brought to its full potential, this vision could allow software developers to take advantage of agents to automatically discover and compose Web Services over the Internet to build a distributed system. In the past years, there have been many issues discussed about web services, regarding their implementation, their founding principles and so on. But there is still a concern that would need to be investigated: the trustworthiness provisioning. The aim of this thesis is to provide a complete study about this issue in Service Oriented Computing environments. In Chapter 1 we aim at explaining the rationale behind {SOA,} discussing about the historical reasons that gave life to this paradigm. Then, an explanation of the current de finition of Service Oriented Paradigm will be provided, showing di fferent use cases involving this concept. We will illustrate how di fferent technologies try to meet the requirements of this pattern, focusing the attention on those that nowadays are considered the de facto standard to concretise the service orientation vision. Essentially, in Chapter {2,} an exhaustive analysis of the state of the art concerning trust provisioning is provided. Trust provisioning is discussed both broadly speaking and re fining more details speci fically related to the Service Oriented Computing environment. The first contribution of this work has been to categorize the most notable works in few categories, depending on the rationale of their approach. This way it has been possible to highlight the shortcomings and the advantages of each category." }