REMARKS ON IBE SCHEME OF WANG AND CAO

Sunder Lal; Priyam Sharma

Paper 2007/400

REMARKS ON IBE SCHEME OF WANG AND CAO

Sunder Lal and Priyam Sharma

Abstract

In this paper we analyze and find an anomaly in the security proof of the identity-based encryption (IBE) scheme fullM-IBE of Wang and Cao [9], which is based on mBDHP. Here we give another proof for fullM-IBE which is based on Bilinear Diffie-Hellman Problem (BDHP). We also obtain a tightness improvement using a stronger assumption, namely, the Bilinear Inverse Dicision Diffie-Hellman problem (BIDDHP).

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: Public-Key Encryption Identity-Based Encryption (IBE)IND-ID-CCA attack BDHP BIDDHP Random Oracle.
Contact author(s): sunder_lal2 @ rediffmail com
priyam_sharma ibs @ rediffmail com
History: 2007-11-14: revised; 2007-10-21: received; See all versions
Short URL: https://ia.cr/2007/400
License: CC BY

BibTeX

@misc{cryptoeprint:2007/400,
      author = {Sunder Lal and Priyam Sharma},
      title = {REMARKS ON IBE SCHEME OF WANG AND CAO},
      howpublished = {Cryptology ePrint Archive, Paper 2007/400},
      year = {2007},
      note = {\url{https://eprint.iacr.org/2007/400}},
      url = {https://eprint.iacr.org/2007/400}
}