Koji Chida Kunio Kobayashi Hikaru Morita An Auction Protocol Preserving Privacy of Losing Bids with a Secure Value Comparison Scheme. 173-181 http://search.ieice.org/bin/summary.php?id=e87-a_1_173&category=D&year=2004&lang=E&abst= 2004 87-A IEICE Transactions 1 db/journals/ieicet/ieicet87a.html#ChidaKM04