基于身份基变色龙哈希的可编辑区块链方案

he immutability of blockchain technology can be used to ensure the security and right confirmation of data, but there are also problems that illegal information cannot be cleaned up in the chain and wrong operations cannot be remedied. Therefore, it is very necessary to study the scheme of editable blockchain. The existing editable blockchain schemes mainly use Chameleon hash function to generate a unique hash trap for the supervisor to realize supervision, but can not provide blockchain users with the ability to modify transactions. This paper studies the editable blockchain scheme based on identity based chameleon hash. Firstly, an identity based chameleon hash without key disclosure is designed. Then, an identity based Merkle tree construction method and a modified transaction signature method that can still be verified are designed. Finally, the experimental analysis shows that the editable blockchain scheme in this paper is feasible.