基于以太坊智能合约的密封式区块链拍卖可信方案的研究

Research on Trusted Scheme of Sealed Blockchain Auction Based on Ethereum Smart Contract

摘要: 为解决传统拍卖方式透明度低，成本高等问题，加强拍卖的透明度和可信度，本文提出了一种基于区块链的密封式拍卖方案。首先将拍卖商品放到区块链上进行竞价、揭价，然后为保障交易资金的安全，本方案在拍卖结束后还设计了资金托管，依照多重签名的逻辑投票决定资金最终流向。同时，本方案分阶段使用了Keccak256加密算法、椭圆曲线签名算法ECDSA和RSA数字签名算法来优化拍卖流程。最后对该方案的可信度做了一个安全性分析，证明了该方案在智能合约不被伪造的情况下是安全的。

Abstract: In order to solve the problems of traditional auction methods such as low transparency and high costs and enhance the transparency and credibility of auctions, this paper proposes a sealed auction scheme based on blockchain. Firstly, the goods shall be put on blockchain for bidding and price un-covering; then in order to ensure the security of the transaction funds, the funds trusteeship after the auction is designed in this scheme. According to the logic of multi-signature, the final fund flow will be decided by voting. Meanwhile, this scheme optimizes the auction process by using Keccak256 encryption algorithm, elliptic curve signature algorithm ECDSA and RSA digital signature algorithm by stages. Finally, through the security analysis of the credibility of this scheme, it is proved that the scheme is secure under the condition that smart contracts are not forged.