Automorphic Signatures in Bilinear Groups

  title={Automorphic Signatures in Bilinear Groups},
  author={Georg Fuchsbauer},
We introduce the notion of automorphic signatures, which satisfy the following properties: the verification keys lie in the message space, messages and signatures consist of group elements only, and verification is done by evaluating a set of pairing-product equations. These signatures make a perfect counterpart to the powerful proof system by Groth and Sahai (Eurocrypt 2008). We provide practical instantiations of automorphic signatures under appropriate assumptions and an extension yielding… CONTINUE READING