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Structure-Preserving Signatures on Equivalence Classes and Constant-Size Anonymous Credentials
2018
Journal of Cryptology
Structure-preserving signatures (SPS) are a powerful building block for cryptographic protocols. We introduce SPS on equivalence classes (SPS-EQ), which allow joint randomization of messages and signatures. Messages are projective equivalence classes defined on group element vectors, so multiplying a vector by a scalar yields a different representative of the same class. Our scheme lets one adapt a signature for one representative to a signature for another representative without knowledge of
doi:10.1007/s00145-018-9281-4
fatcat:yo4uxp4sb5aubiosnkp2fbvrja