@TechReport{FreilingHerlihyPenso05,
  author =	 "Felix Freiling and Maurice Herlihy and Lucia Draque Penso",
  title =	 "Optimal Randomized Fair Exchange with Secret Shared Coins",
  institution =	 "RWTH Aachen",
  year =	 "2005",
  number =	 "AIB-2005-22",
  month =	 december,
  url =          "http://aib.informatik.rwth-aachen.de/2005/2005-22.ps",
}