Yasunobu Nohara Sozo Inoue Hiroto Yasuura Unlinkability and Real World Constraints in RFID Systems. 371-376 2007 conf/percom/2007w PerCom Workshops http://dx.doi.org/10.1109/PERCOMW.2007.122 db/conf/percom/percomw2007.html#NoharaIY07