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Redactable Signature Schemes and Zero-Knowledge Proofs are two radicallydifferent approaches to enable privacy. This paper analyses their merits anddrawbacks when applied to decentralized identity system. Redactable Signatures,though competitively quick and compact, are not as expressive as zero-knowledgeproofs and do not provide the same level of privacy. On the other hand,zero-knowledge proofs can be much faster but some protocols require a trustedset-up. We conclude that given the benefits and drawbacks, redactablesignatures are more appropriate at an earlier stage and zero-knowledge proofsare more appropriate at a later stage for decentralized identity systems

Redactable Signature Schemes and Zero-knowledge Proofs: A comparative examination for applications in Decentralized Digital Identity Systems