Kun Peng Colin Boyd Ed Dawson Kapalee Viswanathan Efficient Implementation of Relative Bid Privacy in Sealed-Bid Auction. 244-256 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2908&spage=244 2003 conf/wisa/2003 WISA db/conf/wisa/wisa2003.html#PengBDV03