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Master in Computing

Master of Science Thesis

Privacy and Confidentiality issues in Cloud Computing architectures

David Jim?nez Mart?nez Advisor/s: Drs. Cristina G?mez Seoane

Dr. Xavier Franch Guti?rrez 09/09/2013

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Privacy and Confidentiality issues in Cloud Computing architectures

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Acknowledgements

I would wish to be grateful to all people that supported me while working on this master thesis, whose input has proven invaluable to accomplish the defined objectives.

I'm thankful to my advisors, Drs. Cristina G?mez Seoane and Dr. Xavier Franch Guti?rrez, for encouraging me, guiding and helping me through the development of this Master Thesis by providing starting bibliography and tips, and for continuously reviewing my work. Our discussions have made this master thesis possible.

I would like to give a special mention to Christoph Fischer, a student of Business Information Technology from the Zurich University of Applied Sciences (Switzerland) who was working on a project about non-functional requirements in Cloud Computing, with who we shared our gathered bibliography about the topic, tips and with who I could prepare some questions for interviewing through him several people at the Swiss Cloud Conference 2012.

Also, I would like to thank to my dear friend, Noem?, for sharing working experiences with me and infuse me with motivation.

Finally, I am specially grateful to my girlfriend Judit and my mother for being patient with me, giving me wise tips, support and motivate me while working on this master thesis, making my days better on these tough economic times.

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Index of Contents

Chapter 1: Introduction................................................................................................................... 13 1.1. Motivation.......................................................................................................................... 13 1.2. Thesis objectives and organization....................................................................................15 1.3. Starting point...................................................................................................................... 16

Chapter 2: Cloud Computing: Background information and definitions...........................................19 2.1. Definitions of Cloud Computing..........................................................................................19 2.2. Actors................................................................................................................................ 23 2.3. Delivery models................................................................................................................. 24 2.4. Deployment Models........................................................................................................... 27 2.5. Cloud components............................................................................................................. 29 2.5.1. Technological components.........................................................................................29 2.5.2. Non-technological components..................................................................................31

Chapter 3: The review method: Systematic Literature Review.......................................................35 3.1. Review protocol................................................................................................................. 36 3.1.1. The review question...................................................................................................36 3.1.2. The search and data extraction strategy.....................................................................37 3.1.2.1. Information sources.............................................................................................38 3.1.2.2. Keyword finding...................................................................................................40 3.1.2.3. The search expression.........................................................................................41 3.1.2.4. Exclusion criteria..................................................................................................43 3.1.2.5. Selected publications by references (snowballing)...............................................46 3.1.2.6. Total publications selected...................................................................................48 3.1.2.7. Classification of selected papers..........................................................................50 3.2. Quality assessment of the systematic review.....................................................................50

Chapter 4: Privacy and confidentiality issues and challenges in Cloud Computing: Systematic Review results analysis.................................................................................................................. 57

4.1. What is Privacy?................................................................................................................ 57 4.2. What is confidentiality?......................................................................................................62 4.3. Privacy and Confidentiality concerns, issues and challenges............................................63

4.3.1. Virtualization............................................................................................................... 67 4.3.2. Data location.............................................................................................................. 70

4.3.2.1. Data Outsourcing.................................................................................................71

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