Sciweavers

Share
ISPEC
2010
Springer

Certificateless KEM and Hybrid Signcryption Schemes Revisited

8 years 9 months ago
Certificateless KEM and Hybrid Signcryption Schemes Revisited
Often authentication and confidentiality are required as simultaneous key requirements in many cryptographic applications. The cryptographic primitive called signcryption effectively implements the same and while most of the public key based systems are appropriate for small messages, hybrid encryption (KEM-DEM) provides an efficient and practical way to securely communicate very large messages. Recently, Lippold et al. [13] proposed a certificateless KEM in the standard model and the first certificateless hybrid signcryption scheme was proposed by Fagen Li et al. [15]. The concept of certificateless hybrid signcryption has evolved by combining the ideas of signcryption based on tagKEM and certificateless cryptography. In this paper, we show that [13] is not Type-I CCA secure and [15] is existentially forgeable. We also propose an improved certificateless hybrid signcryption scheme and formally prove the security of the improved scheme against both adaptive chosen ciphertext attack and...
S. Sharmila Deva Selvi, S. Sree Vivek, C. Pandu Ra
Added 13 Oct 2010
Updated 13 Oct 2010
Type Conference
Year 2010
Where ISPEC
Authors S. Sharmila Deva Selvi, S. Sree Vivek, C. Pandu Rangan
Comments (0)
books