M Novak,
PJ Leach, Y Zeng, S Sinha, KM Short… - US Patent …, 2014 - Google Patents
US 2013/OO61301A1 Mar. 7, 2013(57) ABSTRACT 51) Int. CA distributed system in which
time-dependent credentials are (51) o 2I/00(2013.01) supplied by controllers that operate …