论文标题
高效且细粒度可误分级的区块链支持问责制和更新政策
Efficient and Fine-grained Redactable Blockchain Supporting Accountability and Updating Policies
论文作者
论文摘要
可分割的区块链旨在确保大多数申请数据的数据不变性，并为某些特定应用程序（例如从区块链中删除非法内容）提供授权的可变性。但是，现有的可分子区块链方案具有较低的编辑效率，并且缺乏负责任且可更新的细粒机制来控制编辑权。为了解决上述问题，我们提出了一个有效且细粒度的可误分块方案，并具有问责制和可更新的策略。在我们的计划中，交易所有者可以设置与交易关联的可更新策略，只有符合策略的用户才能成为交易的编排。为了防止编辑器滥用正确的编辑性，我们介绍了证人群体的概念。且仅当它包含编辑器和证人集团的签名时，编辑性交易是合法的。我们首先给出证人群体的概念，然后展示拟议的计划。最后，我们通过一系列实验和分析证明了方案是可行有效的。
Redactable Blockchain aims to ensure immutability of the data for most of appications, and provide authorized mutability for some specific applications such as removing illegal content from blockchains. However, the existing redactable blockchain scheme has low redacting efficiency, and lacks an accountable and updatable fine-grained mechanism to control redacting rights. To solve the above problems, we propose an efficient and fine-grained redactable blockchain scheme with accountability and updatable policies. In our scheme, the transaction owner can set the updatable policy associated with the transaction, and only users who meet the policy can become the redactor of the transaction. In order to prevent redactors from abusing redacting right, we introduce the concept of a witness group. A redacted transaction is legal if and only if it contains the signatures of redactor and witness group. We first give the concept of witness group, and then show the proposed scheme. Finally, we demonstrate that scheme is feasible and efficient through a series of experiments and analysis.
