BEADS: Blockchain-Empowered Auction in Decentralized Storage
Xinxuan Huang, Jigang Wu, Jiaxing Li, Chengpeng Xia · 2021
Cloud storage is an efficient paradigm for managing the outsourced data for users, and its security can be enhanced by the blockchain technique. However, in the existing blockchain-based cloud storage schemes, distribution of vacant storage is unbalanced while users have various storage demands. This paper first formulates the problem of maximizing total utility for the cloud storage allocation in blockchain network. Then, a blockchain-empowered storage auction mechanism (BEADS) with double-chain structure is proposed, in order to improve the balance and effectiveness of cloud storage. The auction is truthful and individually rational while the budget is balanced. Specifically, a blockchain-based smart contract is utilized to replace the auctioneer for a more secure cloud storage auction. Experimental results show that the proposed scheme outperforms the baselines TACD, TACDpp and HAF, in terms of utility, resource proportion, and individual matching, respectively.