Paper 2009/455

Identity-Based Hybrid Signcryption

Fagen Li, Masaaki Shirase, and Tsuyoshi Takagi

Abstract

Signcryption is a cryptographic primitive that fulfills both the functions of digital signature and public key encryption simultaneously, at a cost significantly lower than that required by the traditional signature-then-encryption approach. In this paper, we address a question whether it is possible to construct a hybrid signcryption scheme in identity-based setting. This question seems to have never been addressed in the literature. We answer the question positively in this paper. In particular, we extend the concept of signcryption key encapsulation mechanism to the identity-based setting. We show that an identity-based signcryption scheme can be constructed by combining an identity-based signcryption key encapsulation mechanism with a data encapsulation mechanism. We also give an example of identity-based signcryption key encapsulation mechanism.

Metadata
Available format(s)
PDF PS
Category
Public-key cryptography
Publication info
Published elsewhere. This is the full version of a paper published in ARES 2009
Contact author(s)
fagenli @ uestc edu cn
History
2009-09-20: received
Short URL
https://ia.cr/2009/455
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2009/455,
      author = {Fagen Li and Masaaki Shirase and Tsuyoshi Takagi},
      title = {Identity-Based Hybrid Signcryption},
      howpublished = {Cryptology ePrint Archive, Paper 2009/455},
      year = {2009},
      note = {\url{https://eprint.iacr.org/2009/455}},
      url = {https://eprint.iacr.org/2009/455}
}
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.