Securing Electronic Bidding System with Self-healing Broadcast Encryption Scheme

摘要

Electronic bidding system has become an increasingly popular method for transacting business, especially over the Internet. A self-healing key distribution scheme enables a group of users to establish a group key over an unreliable channel. We propose a group key distribution scheme with self-healing feature to suitable internet context. With this scheme, a group of colluding bidders cannot control the contract price arbitrarily and all bidders are never revealed to anyone, while the other losers can verify the fact that the winner belongs to their group. The bidder can recover the result message which has been lost.