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Title:
REMARKS ON IBE SCHEME OF WANG AND CAO
Authors: 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).
ePrint: https://eprint.iacr.org/2007/400
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