Koutarou Suzuki Kunio Kobayashi Hikaru Morita Efficient Sealed-Bid Auction Using Hash Chain. 183-191 2000 conf/icisc/2000 ICISC http://link.springer.de/link/service/series/0558/bibs/2015/20150183.htm db/conf/icisc/icisc2000.html#SuzukiKM00