BRaccoon: Concurrently Secure Blind Lattice Signatures from Raccoon

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Blind signatures are a central primitive for privacy-preserving applications such as e-cash, anonymous credentials, and e-voting. Classical constructions such as blind Schnorr adapt an ordinary signature scheme while producing signatures that follow the same format and distribution as those generated by the ordinary signing algorithm. This property is particularly relevant in settings where blind and non-blind signatures coexist within the same infrastructure. Achieving an analogous result f