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The paper built simplified model and dynamic equation of man-gun system, according to statistical law of B.M and B.H, under the known height and weight of human body, estimating the parameters for the each quality and moment of inertia of human body. By lots of shooting experiments, the dynamics parameter of each position of human body can be measured with mode analysis method. So, the dynamics parameter...
In the regular ring signature, once the secret key is compromised, all signature before the compromise will not be trustworthy any more. Recently, to overcome the shortcomings, Wang et al. proposed a forward-secure ring signature scheme. However, in this paper, we show the scheme doesn't satisfy the forward security. That is the adversary can forge the former signature if the signer's current secret...
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