This textbook provides an unique lens through which the myriad of existing privacy enhancing technologies (PETs- Privacy Enhancing Technologies) can be easily comprehended and appreciated. This textbook answers the questions below with clear and detailed explanations, focusing on three fundamental elements listed below as well.Why is privacy important? How and why is your privacy being eroded and what risks can this pose for you? What are some tools for protecting your privacy in online environments? How can these tools be understood, compared, and evaluated? What steps can you take to gain more control over your personal data?It introduces a simple classification of PETs that allows their similarities and differences to be highlighted and analyzed;It describes several specific PETs in each class, including both foundational technologies and important recent additions to the field;It explains how to use this classification to determine which privacy goals are actually achievable in a given real-world environment. Once the goals are known, this allows the most appropriate PETs to be selected in order to add the desired privacy protection to the target environment. To illustrate, the book examines the use of PETs in conjunction with various security technologies, with the legal infrastructure, and with communication and computing technologies such as Software Defined Networking (SDN) and Machine Learning (ML).Designed as an introductory textbook on PETs, this textbook is essential reading for graduate-level students in computer science. Prospective PETs researchers, privacy advocates, and anyone interested in technologies to protect privacy in online environments will  find this textbook useful as well.weiterlesen