论文标题
NFTS的所有者真的拥有其资产吗？首先看NFT到达的连接脆弱性
Do NFTs' Owners Really Possess their Assets? A First Look at the NFT-to-Asset Connection Fragility
论文作者
论文摘要
NFT（不可杀死的代币）经历了爆炸性的增长，并且已经看到了创纪录的价格。通常，NFT代表的资产是通过指针（例如多跳上URL）储存的，这是由于昂贵的链上存储而存储的。因此，本文的目的是回答以下问题：NFT-To-Asset连接是否脆弱？本文从三个角度，存储，可访问性和重复的情况下，表征了12,353个以太坊NFT合同（总共6,234,141 NFT）的NFT到达的连接迈出了第一步。为了克服影响测量准确性的挑战，例如IPFS不稳定性以及IPF和服务器数据的可用性不断变化，我们建议利用多个网关来扩大数据覆盖范围，并扩大较长的测量周期，并延长较长的测量期。我们广泛研究的结果表明，这种联系在实践中非常脆弱。损失，不可用或重复链链资产可能会使NFT的价值毫无价值。例如，我们发现无法获得25.24％的以太坊NFT合同资产，而21.48％的以太坊NFT合同包括重复的资产。我们的工作阐明了沿NFT-To-Asset连接沿线的脆弱性，这可以帮助NFT社区更好地增强链链资产的信任。
NFTs (Non-Fungible Tokens) have experienced an explosive growth and their record-breaking prices have been witnessed. Typically, the assets that NFTs represent are stored off-chain with a pointer, e.g., multi-hop URLs, due to the costly on-chain storage. Hence, this paper aims to answer the question: Is the NFT-to-Asset connection fragile? This paper makes a first step towards this end by characterizing NFT-to-Asset connections of 12,353 Ethereum NFT Contracts (6,234,141 NFTs in total) from three perspectives, storage, accessibility and duplication. In order to overcome challenges of affecting the measurement accuracy, e.g., IPFS instability and the changing availability of both IPFS and servers' data, we propose to leverage multiple gateways to enlarge the data coverage and extend a longer measurement period with non-trivial efforts. Results of our extensive study show that such connection is very fragile in practice. The loss, unavailability, or duplication of off-chain assets could render value of NFTs worthless. For instance, we find that assets of 25.24% of Ethereum NFT contracts are not accessible, and 21.48% of Ethereum NFT contracts include duplicated assets. Our work sheds light on the fragility along the NFT-to-Asset connection, which could help the NFT community to better enhance the trust of off-chain assets.
