Simon W. Moore Robert D. Mullins Paul A. Cunningham Ross J. Anderson George S. Taylor Improving Smart Card Security Using Self-Timed Circuits. 211-218 2002 conf/async/2002 ASYNC http://doi.ieeecomputersociety.org/10.1109/ASYNC.2002.1000311 db/conf/async/async2002.html#MooreMCAT02