A New General Dynamic Key Escrow Scheme
Yan Hong-bin, Ding Yuan, Dang Huai-yi · Journal of the China Railway Society · 2006
Based on the ElGamal public key cryptosystem and one-way function,a dynamic key escrow scheme is presented in this paper,which can effectually identify cheaters,and be applicable to arbitrary access structures.Compared with the schemes of the same sorts,it has the following good properties:(1) The key-shadows can be reused for many times;(2) when some key agents' key-shadows are revealed,they can be renewed without any effect on the others;(3) the scheme can accept or fire a key agent easily.The scheme is able to verify the key-shadows of the key agents effectively,discover the failure ones,and increase flexibility of key escrow.