Release time:2025-03-31

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DOI number:10.1109/TrustCom56396.2022.00130

Journal:2022 IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

Place of Publication:Wuhan, China

Key Words:Performance evaluation;Data privacy;Protocols;Costs;System performance;Resists;Blockchains;chameleon hash;cross-audit;editing privilege;redactable blockchain

Abstract:Redactable blockchain allows modifiers or voting committees with modification privileges to edit the data on the chain. Among them, trapdoor holders in chameleon-based hash redactable blockchains can quickly compute hash collisions for arbitrary data without breaking the link of the hash-chain. However, chameleon-based hash redactable blockchain schemes have difficulty solving issues such as editing operations with different granularity or conflicts and auditing modifiers that abuse editing privileges. To address the above challenges, we propose a redactable blockchain with Cross-audit and Diversity Editing (CDEdit). The proposed scheme distributes subdivided transaction-level and block-level tokens to the matching modifier committee to weaken the influence of central power. A number of modifiers are unpredictably selected based on reputation value proportions and the mapping of the consistent hash ring to enable diversity editing operations, and resist Sybil attacks. Meanwhile, an adaptive cross-auditing protocol is proposed to adjust the roles of modifiers and auditors dynamically. This protocol imposes a reputation penalty on the modifiers of illegal edits and solves the problems of abuse of editing privileges and collusion attacks. In addition, We used ciphertext policy attribute-based encryption (CP-ABE) and chameleon hashes with ephemeral trapdoor (CHET) for data modification, and present a system steps and security analysis of CDEdit. Finally, the extensive comparisons and evaluations show that our scheme costs less time overhead than other schemes and is suitable for complex application scenarios, e.g. IoT data management.

Co-author:Gao Ying

First Author:Chen Xiaofeng

Indexed by:会议论文

Correspondence Author:高莹

Page Number:945-952

ISSN No.:2324-898X

Translation or Not:no