On the security of the identity-based encryption based on DHIES from ASIACCS 2010

Authors

Willy Susilo, University of WollongongFollow
Joonsang Baek, Institute for Infocomm Research SingaporeFollow

RIS ID

44871

Publication Details

Susilo, W. & Baek, J. (2011). On the security of the identity-based encryption based on DHIES from ASIACCS 2010. In B. Cheung, L. Hui & R. Sandhu (Eds.), Proceedings of the 6th International Symposium on ACM Symposium on Information, Computer and Communications Security (ASIACCS 2011) (pp. 376-380). New York: ACM.

Abstract

In ASIACCS 2010, Chen, Charlemagne, Guan, Hu and Chen proposed an interesting construction of identity-based encryption based on DHIES, whose key extraction algorithm makes use of the multivariate quadratic equation. They proved that their scheme is selective-ID secure against chosen ciphertext attack, i.e. secure in the sense of IND-sIDGGA. Unfortunately, in this paper, we demonstrate that Chen et aJ.'s scheme is insecure in the sense of IND-sID-GGA by showing that the private key extraction algorithm of their scheme can be exploited to apply XL algorithm, which is to solve the multivariate quadratic (MQ) problem (under certain conditions).