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How to fake zero-knowledge proofs, again


In 2012, Bernhard et al. showed that the Fiat-Shamir heuristic must be used with great care in zero-knowledge proofs. We explain how, in the Belenios voting system, while not using the weak version of Fiat-Shamir, there is still a gap that allows to fake a zero-knowledge proof in certain circumstances. Therefore an attacker who corrupts the voting server and the decryption trustees could break verifiability.
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hal-02928953 , version 1 (03-09-2020)


  • HAL Id : hal-02928953 , version 1


Véronique Cortier, Pierrick Gaudry, Quentin Yang. How to fake zero-knowledge proofs, again. E-Vote-Id 2020 - The International Conference for Electronic Voting, 2020, Bregenz / virtual, Austria. ⟨hal-02928953⟩
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