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Revocable policy-based chameleon hash for blockchain rewriting

Tian, Y., Miyaji, A., Matsubara, K., Cui, H.ORCID: 0000-0002-5820-2233 and Li, N. (2022) Revocable policy-based chameleon hash for blockchain rewriting. The Computer Journal .

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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.

Item Type: Journal Article
Publisher: Oxford University Press
Copyright: © 2022 The British Computer Society
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