Redactable and sanitizable signature schemes: applications and limitations for use in decentralized digital identity systems
B. Kumara, M. Hooper, Carsten R. Maple, T. Hobson, Jon Crowcroft · IET conference proceedings. · 2023
Redactable signature schemes and sanitizable signature schemes are methods that permit modification of a given digital message and retain a valid signature. This can be applied to decentralized identity systems for delegating identity issuance and redacting sensitive information for privacy-preserving verification of identity. We propose implementing these protocols on a digital credential and compare them against other privacy-enhancing techniques to assess their suitability.