Abstract: Anonymity is a vital properly of sealed-bid. A security electronic auction should satisfy the following properties: (1)equity, (2)security of bid, (3)anonymity and (4)validity of the bidder's bid. In this paper, we propose a full anonymous and convertible multi-certificate electronic auction in the case of protecting the winning bidder. It can resist rigging-bid by multi-certificate and protect the real identity of the winner by crypt-sign and verify bid's validity of the winner by the undeniable converting signature. It is full anonymity in the whole auction and no one can manipulate the other bidders.

Key words: full anonymity, seal-bid, one-way function, resisting rigging-bid