Efficient batch verification for RSA-Type digital signatures in a ubiquitous environment

  • Authors:
  • Seungwon Lee;Yookun Cho

  • Affiliations:
  • School of Computer Science and Engineering, Seoul National University, Seoul, Korea;School of Computer Science and Engineering, Seoul National University, Seoul, Korea

  • Venue:
  • EUC'06 Proceedings of the 2006 international conference on Embedded and Ubiquitous Computing
  • Year:
  • 2006

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Abstract

The paper addresses batch verification to reduce large computational cost when many digital signatures are verified together, and then presents bad signature identification in the batch verification of signatures too when there is one bad signature in the batch. Our method, EBV (Exponent Based Verifier), can verify a batch of signatures and identify a bad signature using one modular exponentiation and $2n+3\sqrt{n}/2$ modular multiplications where n is the number of signatures in the batch instances. Simulation results also show the proposed method reduces considerably the number of modular multiplications compared with the existing methods