Efficient and Fine-grained Redactable Blockchain Supporting Accountability and Updating Policies. (arXiv:2211.08813v1 [cs.CR])

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 …

accountability blockchain policies