C*-+ and HM: Variations Around Two Schemes of T. Matsumoto and H. Imai

@inproceedings{Patarin1998CAH,
  title={C*-+ and HM: Variations Around Two Schemes of T. Matsumoto and H. Imai},
  author={Jacques Patarin and Louis Goubin and Nicolas Courtois},
  booktitle={ASIACRYPT},
  year={1998}
}
In [4], H. Imai and T. Matsumoto presented new candidate trapdoor one-way permutations with a public key given as multivariate polynomials over a finite field. One of them, based on the idea of hiding a monomial field equation, was later presented in [7] under the name C∗. It was broken by J. Patarin in [8]. J. Patarin and L. Goubin then suggested ([9], [10], [11], [12]) some schemes to repair C∗, but with slightly more complex public key or secret key computations. In part I, we study some… CONTINUE READING
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