Koutarou Suzuki Makoto Yokoo Secure Combinatorial Auctions by Dynamic Programming with Polynomial Secret Sharing. 44-56 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2357&spage=44 2002 conf/fc/2002 Financial Cryptography db/conf/fc/fc2002.html#SuzukiY02