On-Chip Electric Waves: An Analog Circuit Approach to Physical Uncloneable Functions. - György Csaba; Xueming Ju; Qingqing Chen 004; Wolfgang Porod; Jürgen Schmidhuber; Ulf Schlichtmann; Paolo Lugli; Ulrich Rührmair (IACR Cryptol. ePrint Arch., 2009)