International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Efficient Generalized Signcryption Schemes

Prashant Kushwah
Sunder Lal
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Abstract: Generalized signcryption is a new cryptographic primitive which works as a signcryption scheme, a signature scheme and an encryption scheme as per need. Recently Ji et al. proposed a security model for certificateless generalized signcryption scheme and also proposed a scheme which they claim is secure under the proposed security model. In this paper we show that Ji et al. scheme is not existentially unforgeable against Type-I adversary and propose a simplified certificateless generalized signcryption. We also present an efficient identity based generalized signcryption scheme.
  title={Efficient Generalized Signcryption Schemes},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / signcryption, generalized signcryption, identity based cryptography, certificateless cryptography},
  note={, 14776 received 16 Jun 2010},
  author={Prashant Kushwah and Sunder Lal},