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(BlindedMessage, PrivateKey) -> BlindedSignature
Generate an RSA signature on a blinded message such that the signer does not learn the message content, and the resulting signature can be unblinded to a valid standard signature.
Problem it solves
Issuing cryptographic credentials or tokens without allowing the issuer to link the token's usage back to the original request.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.