Revocable Policy-Based Chameleon Hash for Blockchain Rewriting

【Author】 Tian, Yangguang; Miyaji, Atsuko; Matsubara, Koki; Cui, Hui; Li, Nan

【Source】COMPUTER JOURNAL

【影响因子】1.762

【Abstract】Policy-based chameleon hash is a useful primitive for blockchain rewriting systems. It allows a user to create a mutable transaction associated with an access policy, whereas a modifier who possesses sufficient rewriting privileges from a trusted authority satisfying the access policy can rewrite the mutable transaction. However, it lacks a revocation mechanism. The modifiers can always rewrite the mutable transactions even if their given rewriting privileges are compromised. In this work, we introduce revocable policy-based chameleon. The property of revocation allows some modifiers' rewriting privileges to be revoked, regardless of whether their rewriting privileges are compromised or not.

【Keywords】blockchain rewriting; policy-based chameleon hash; revocation

【发表时间】

【收录时间】2022-07-17

【文献类型】理论性文章

【主题类别】

区块链技术-核心技术-扩展方案