Side Channel Attacks - Highly Promising Directions in Modern Cryptanalysis

Vlastimil Klíma, Tomáš Rosa


The traditional cryptanalysis tends to examine cryptosystems as purely abstract mathematical functions without any direct connection with the objective physical reality. The theory and practice of side channels is completely changing such an understanding of cryptanalysis. In a short time after being introduced (in 1996 by Dr. Paul Kocher), it brought us fascinating results which would be very hard to achieve when viewing the cryptanalysis in the traditional way. In the speech, we briefly introduce the theory of side channel cryptanalysis and point out several interesting thoughs behind side channel attacks.


RNDr. Vlastimil Klíma graduated in mathematical analysis at the Faculty of Mathematics and Physics of the Charles University, Prague. In his career, he has distinguished himself as the leading Czech cryptologist. For 10 years, he worked for the state administration (Ministry of Interior, Czech Army HQ). He has been working in the private sector for the last 10 years. At present, he is with ICZ a.s.

Tomáš Rosa, MSc., graduated in theoretical computer science at the Faculty of Electrical Engineering at the Czech Technical University in Prague. At present he is a postgraduate fellow at the Department of Computer Science, FEE, CTU in Prague. He works very intensively in the area of side channel cryptanalysis. Together with Dr. Klíma, he has contributed to this area by discovering new effective attacking methods. Besides their theoretical merits, these methods can be directly employed in practical attacks on contemporary security modules. He is chief cryptologist with ICZ a.s.