Data processing: financial – business practice – management – or co – Automated electrical financial or business practice or... – Finance
Reexamination Certificate
2005-08-30
2005-08-30
Jasmin, Lynda (Department: 3627)
Data processing: financial, business practice, management, or co
Automated electrical financial or business practice or...
Finance
Reexamination Certificate
active
06938012
ABSTRACT:
Numbers 1, 2, . . . , M are assigned to bidding prices from the minimum to maximum values V1to VN. For a bidding value Vvieach user11-igenerates two sequences of information si={si,1, si,2, . . . , si,M} and ti={ti,1, ti,2, . . . , ti,M} such that si,1=ti,1, . . . , si,vi−1=ti,vi−1, si,vi≠ti,vi, . . . , si,M≠ti,M, then secretly sends the two sequences of information siand tito quantitative competition apparatuses15A and15B, respectively, and sends hash values H1i=h(si) and H2i=h(ti) of the two sequences of information siand tiand a hash value h(Vvi∥ri) containing an intended value Vvito a bulletin board apparatus21. The quantitative competition apparatuses15A and15B extract w-th elements si,wfrom respective sequences s1to sNand w-th elements ti,wfrom respective sequences t1to tN, then create a concatenation Seqs,wof N elements si,wand a concatenation Seqt,wof N elements ti,w, then compare them using a one-way function without revealing their values, and, if they differ, deciding that the intended value Vviequal to or smaller than a value Vwis present, and determines the minimum value by changing w.
REFERENCES:
patent: 6443841 (2002-09-01), Rossides
patent: 2001/0056396 (2001-12-01), Goino
patent: 1071025 (2001-01-01), None
Kobayashi et al. “Efficient Sealed-Bid Auction by Using One-Way Functions” Jan. 2001, Communications and Computer Science vol. E84A, No. 1, p. 289-94 (Dialog File 2, #6837666).
Le et al. “A Public Key Extension to the Common Cryptographic Architecture” 1993, IBM Systems Journal, v23n3, pp:461-485, (Dialog file 15, #00759575).
M2 Presswire “The Development of Japan's First Electronic Bidding System Capable of Proving the Authenticity of a transaction to third parties; To be Adopted by Yokosuka City as First Electronic Bidding System in Japanese Local Governments” Apr. 2001.
Chida Koji
Kobayashi Kunio
Morita Hikaru
Jasmin Lynda
Nippon Telegraph and Telephone Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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