论文标题
CDEDIT：一种非常适用的可分子区块链，具有可控的编辑特权和多元化的编辑类型
CDEdit: A Highly Applicable Redactable Blockchain with Controllable Editing Privilege and Diversified Editing Types
论文作者
论文摘要
可分割的区块链允许具有修改特权的修饰符或投票委员会编辑链条上的数据。基于变色龙的哈希可分离区块链中的陷阱架可以快速计算任意数据的哈希碰撞，而不会破坏哈希链的链接。但是，基于变色龙的哈希可分离区块链方案难以解决多层编辑请求的问题并竞争修改特权。在本文中，我们提出了CDEDIT，这是一种高度适用的可分割区块链，具有可控的编辑特权和多元化的编辑类型。拟议的计划通过按每个编辑请求支付存款来增加无效或恶意请求的成本。同时，将编辑特权细分为请求，修改和验证特权，并有效地分发了修改特权令牌，以防止滥用修改特权和串通攻击。我们将Chameleon哈希与临时陷阱门（CHET）和基于密文策略属性加密（CP-ABE）一起实现两种编辑类型的交易级别和块级，并介绍实例化和安全分析。最后，实施和评估表明，我们的计划仅花费低性能开销，适合多层编辑请求和修改特权竞争方案。
Redactable blockchains allow modifiers or voting committees with modification privileges to edit the data on the chain. Trapdoor holders in chameleon-based hash redactable blockchains can quickly compute hash collisions for arbitrary data, and without breaking the link of the hash-chain. However, chameleon-based hash redactable blockchain schemes have difficulty solving the problem of multi-level editing requests and competing for modification privileges. In this paper, we propose CDEdit, a highly applicable redactable blockchain with controllable editing privilege and diversified editing types. The proposed scheme increases the cost of invalid or malicious requests by paying the deposit on each edit request. At the same time, the editing privilege is subdivided into request, modification, and verification privileges, and the modification privilege token is distributed efficiently to prevent the abuse of the modification privilege and collusion attacks. We use chameleon hashes with ephemeral trapdoor (CHET) and ciphertext policy attribute-based encryption (CP-ABE) to implement two editing types of transaction-level and block-level, and present a practical instantiation and security analysis. Finally, the implementation and evaluation show that our scheme only costs low-performance overhead and is suitable for multi-level editing requests and modification privilege competition scenarios.
