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A New Identification Scheme based on the Gap Diffie-Hellman Problem

By Myungsun Kim and Kwangjo Kim


We introduce a new identification scheme based on the Gap Diffie-Hellman problem. Our identification scheme makes use of the fact that the computational Diffie-Hellman problem is hard in the additive group of points of an elliptic curve over a finite field, on the other hand, the decisional Diffie-Hellman problem is easy in the multiplicative group of the finite field mapped by a bilinear map. We prove that this scheme is secure against active attacks if the Gap Diffie-Hellman problem is intractable. Finally, we analyze efficiency of the scheme comparing with other identification schemes

Year: 2002
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