The BBS Signatures scheme defined in , describes a multi-message digital signature, that supports selectively disclosing the messages through unlinkable presentations, built using zero-knowledge proofs. Each BBS proof reveals no information other than the signed messages that the Prover chooses to disclose in that specific instance. As such, the Verifier (i.e., the recipient) of the BBS proof, may not be able to track those presentations over time. Although in many applications this is desira...| www.ietf.org
This document defines an extension to the BBS Signature scheme that supports blind digital signatures, i.e., signatures over messages not known to the Signer.| www.ietf.org
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Applied Crypto| identity.foundation