Tamper resistance of AES: models, attacks and countermeasures

2007 ii ≪Timmy & Finn – Sonnenkinder, die auch im Regen lachen≫ Acknowledgments I am deeply grateful to my supervisor, Prof. Dr. Johannes Blömer, for his great support and continuous encouragement in writing this thesis. Among other topics, he introduced me into the field of tamper resistance and side channel attacks and supplied me with new interesting and challenging problems and ideas. Johannes allowed me great freedom to do my research and he always took time to discuss the ongoing progress. His comments and suggestions were always very helpful to improve my work. I am also truly indebted to my second supervisor, Prof. Dr. Joachim von zur Gathen, who sparked my interest in cryptography. The opportunity to join his working group allowed me to deepen my research in this fascinating area. Furthermore, I would like to thank Dr. Jean-Pierre Seifert, the coordinator of our joint project with the Intel Corporation. The cooperation with Intel not only implied financial support of my research but also provided valuable insights in recent cryptographic problems. This thesis would not have been possible without the generous support of the " Institut für Industriemathematik " of the University of Paderborn. Special thanks go to Tanja Bürger and Dr. Robert Preis who were very helpful in handling all the administrative obstacles.