REMARKS ON IBE SCHEME OF WANG AND CAO

Sunder Lal; Priyam Sharma

Paper 2007/400 Original: eprint.iacr.org/2007/400 ↗

REMARKS ON IBE SCHEME OF WANG AND CAO

Sunder Lal

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: Preprint.
History: 2007-11-14: last updated; 2007-10-21: published
Short URL: https://ia.cr/2007/400
License: https://creativecommons.org/licenses/by/4.0/

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},
      url = {https://eprint.iacr.org/2007/400}
}