I am an associate professor in privacy, security and applied cryptography at the Radboud University Nijmegen. My research is inspired by practical problems. I focus on the design of a secure and privacy friendly Internet of Things. Apart from that I study privacy and identity management in a more general context. Because we have become increasingly dependent on information technology, I believe it is important that that we, users individually as well as society as a whole, remain in control. This means we must do all that is necessary to ensure that the technology is open, transparent, reliable, trustable, secure and aligned with our digital liberties. I think different professionals (engineers, legal scholars, social scientists and even artists) can learn from each other's approaches and results. We should join forces to shape our future in this new world. I am an associate professor in privacy, security and applied cryptography at the <a href="http://www.cs.ru.nl/ds">Digital Security</a> group of the <a href="http://www.cs.ru.nl/">Institute for Computing and Information Sciences</a> of the <a href="http://www.ru.nl/">Radboud University Nijmegen</a>, the Netherlands. My research is inspired by practical problems. I focus on the design of a secure and privacy friendly Internet of Things. Apart from that I study privacy and identity management in a more general context. I enjoy talking about my research, and speaking about it in public to a general audience. That is also one of the main reasons to maintain a <a href="http://blog.xot.nl/">blog</a>. In my free time I enjoy making my <a href="http://www.xot.nl/Sound" target="_top">own music</a>, designing <a href="http://www.xot.nl/Visual" target="_top">visuals</a>, and <a href="http://www.sjok.nl/" target="_top">practice</a> Okinawan <a href="http://www.iogkf.com/" target="_top">Goju Ryu karate-do</a>.