Some Remarks on Security of Receipt-Free E-auction

Recently, a receipt-free scheme is rising for a secure eauction. The goal of a receipt-free scheme in an eauction is to prevent a bid-rigging. If the bid-rigging happens in the e-auction, the winner can get the bidding item with an unreasonably low price. The first receipt-free scheme for the e-auction was proposed by Abe and Suzuki. Chen, Lee and Kim also proposed the extended receipt-free scheme. In this paper, we point out that the proposed receipt-free schemes do not prevent perfectly the bid-rigging attack. Moreover, we indicate that a bid-collision is a possible cause of an eauction. In the strict sense, the bid-collusion is different from the bid-rigging. In this paper, we do not present the scheme which can prevent the bid-collision attack. We compare the bid-rigging attack with the bid-collusion attack, and analyze the security of the existed receipt-free schemes in a viewpoint of the bidrigging attack and the bid-collusion attack. Keyword: E-auction, Security, Receipt-freene...

• Type: Conference
• Year: 2005
• Where: ICITA
• Authors: Yong-Sork Her, Kenji Imamoto, Kouichi Sakurai
• Keywords: Extended Receipt-free Scheme, ICITA 2005, Information Technology, Receipt-free Schemes, Secure Eauction