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Attack on Okamoto et al.'s New Short Signature Schemes
Authors: Fangguo Zhang, Xiaofeng ChenAbstract:
We present an attack on a new short signature scheme
from bilinear pairing proposed by Okamoto et al. at ITCC’05.
We show that any one can derive the secret key of the signer from
any two message-signature pairs and so can forge the signer’s
signature for any message. This means the scheme is totally
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