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In 2009, J. Li and P. Jiang proposed a provably secure identity-based signature scheme using bilinear pairings, which is claimed secure in the standard model. However, we present that any attacker can forge the private key of an identity or a signature if the second part of an identity's private key is not certificated by the Private Key Generator (PKG). Therefore, the signature-based binding of the identity and the private key must be adopted to improve this scheme's security.
Industrial and Information Systems (IIS), 2010 2nd International Conference on (Volume:2 )
Date of Conference: 10-11 July 2010