Soft Redaction of Image Provenance via Zero-Knowledge Proofs
Content provenance standards, such as C2PA, are increasingly used to attach signed records of origin, editing history, and rights to digital images. However, provenance transparency can conflict with privacy -- assertions that strengthen trust in an image may also reveal sensitive information about the creator or capture context. We propose soft redaction for image provenance: a mechanism that replaces sensitive provenance assertions with zero-knowledge proofs (ZKPs) of selected properties over hidden data. Our work focuses on distance proofs. We first show how location assertions can support proofs of proximity to a public reference point, using Chebyshev polynomial approximations within...
| Authors | Muhammad Awan, John Collomosse |
|---|---|
| Primary category | cs.CR |
| Published | 7 August 2026 |
| Last updated at source | 7 August 2026 |
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