Qing-Long Wang

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In 2004, Chang's et al. presented a digital signature scheme without using one-way hash function and message redundancy schemes. They claimed their scheme do not suffer from some forgery attacks such as Shieh's scheme. However, Fu (2005) and Zhang (http://eprint.iacr.org/2004/213.pdf) proposed several forgery attacks on it and showed that message redundancy(More)
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