Markus Dichtl

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It is shown that the amount of true randomness produced by the recently introduced Galois and Fibonacci ring oscillators can be evaluated experimentally by restarting the oscillators from the same initial conditions and by examining the time evolution of the standard deviation of the oscillating signals. The restart approach is also applied to classical(More)
After years of discussion within the RFID security community whether or not asymmetric cryptography would be feasible for RFID tags, we present a major breakthrough towards RFID products incorporating asymmetric authentication. For the challenge-response protocol applied, the response is calculated by performing an elliptic curve point multiplication using(More)
† The work described in this report has been supported by the Commission of the European Communities through the IST program under contract IST-1999-12324. The information in this document is provided as is, and no warranty is given or implied that the information is fit for any particular purpose. The user thereof uses the information at its sole risk and(More)
In their paper “A Provably Secure True Random Number Generator with Built-in Tolerance to Active Attacks”, B. Sunar, W. Martin, and D. Stinson propose a design for a true random number generator. Using SPICE simulation we study the behaviour of their random number generator and show that practical implementations result in a too high frequency signal to be(More)