Security Difference between DSA and Schnorr's Signature

  title={Security Difference between DSA and Schnorr's Signature},
  author={Zhengjun Cao and O. Markowitch},
  journal={2009 International Conference on Networks Security, Wireless Communications and Trusted Computing},
  • Zhengjun Cao, O. Markowitch
  • Published 2009
  • Computer Science
  • 2009 International Conference on Networks Security, Wireless Communications and Trusted Computing
We investigate the security difference between DSA and Schnorr's signature. The security of DSA can be reduced to the problem: to find $m\in \Omega, \rho, \theta\in \mathcal {Z}_q^*$ such that $\mathcal {H}(m) =\rho\left((g^{\rho}y)^{\theta}\,  \mbox{mod}\, p\right) \,\mbox{mod}\, q$,where $\Omega $ denotes the text space and the message$m$ is not restrained. Unlike DSA evaluates the hash function only at the message $m$, Schnorr's signature  adopts a self-feedback mode by evaluating the hash… Expand
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