Mahdi Sedaghat

Mahdi Sedaghat

Postdoctoral Researcher @ COSIC (KU Leuven) | PhD in Cryptography | Freelance

Threshold Structure-Preserving Signatures

Published in Asiacrypt (AC) 2023, Guangzhou, China, 2023

  • Structure-Preserving Signatures are compatible with Groth-Sahai proof systems due to their unique features.
  • In this paper, we fill the existing research gap and define the notion of TSPS.
  • We then propose an instantiation over a novel message space called indexed Diffie-Hellman message space.
  • We prove the security of our proposed TSPS based on a new assumption, called GPS3 against EUF-CiMA security.
  • We then discover the applications on Threshold-Issuance Anonymous Credentials.

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