International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Identity-Based Directed Signature Scheme from Bilinear Pairings

Xun Sun
Jian-hua Li
Gong-liang Chen
Shu-tang Yang
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Abstract: In a directed signature scheme, a verifier can exclusively verify the signatures designated to himself, and shares with the signer the ability to prove correctness of the signature to a third party when necessary. Directed signature schemes are suitable for applications such as bill of tax and bill of health. This paper studies directed signatures in the identity-based setting. We first present the syntax and security notion that includes unforgeability and invisibility, then propose a concrete identity-based directed signature scheme from bilinear pairings. We then prove our scheme existentially unforgeable under the computational Diffie-Hellman assumption, and invisible under the decisional Bilinear Diffie-Hellman assumption, both in the random oracle model.
  title={Identity-Based Directed Signature Scheme from Bilinear Pairings},
  booktitle={IACR Eprint archive},
  keywords={applications / Bilinear pairings; Directed signature; Existential unforgeability; Identity-based cryptography; Invisibility},
  note={ 14067 received 7 Jul 2008},
  author={Xun Sun and Jian-hua Li and Gong-liang Chen and Shu-tang Yang},