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Sacha van Geffen, Netherlands, is the Managing Director of Greenhost. Greenhost is an Internet Hosting Provider dedicated to support freedom of expression and human rights online with the aim of providing a sustainable internet infrastructure and protecting digital rights. He is the Co-author of ‘Basic Internet Security’, a manual for securing your online communication, primarily intended for journalists. He is a specialist in internet security and a participant in the effort to build more secure systems. He has degrees in Information Law and Artificial Intelligence, Science and Technology from the University of Amsterdam.