Designated Confirmer Signatures and Public-Key Encryption are Equivalent

  • Authors:
  • Tatsuaki Okamoto

  • Affiliations:
  • -

  • Venue:
  • CRYPTO '94 Proceedings of the 14th Annual International Cryptology Conference on Advances in Cryptology
  • Year:
  • 1994

Quantified Score

Hi-index 0.00

Visualization

Abstract

The concept of designated confirmer signatures was introduced by Chaum [Cha94] to improve a shortcoming of undeniable signatures. The present paper formalizes the definition of designated confirmer signatures and proves that a designated confirmer signature scheme is equivalent to a public-key encryption scheme with respect to existence. In addition, the paper proposes practical designated confirmer signature schemes which are more efficient in signing than the previous scheme [Cha94].