Abstract
Multivariate Public Key Cryptography (MPKC) is one of the most attractive post-quantum options for digital signatures in a wide array of applications. The history of multivariate signature schemes is tumultuous, however, and solid security arguments are required to inspire faith in the schemes and to verify their security against yet undiscovered attacks. The effectiveness of “differential attacks” on various field-based systems has prompted the investigation of the resistance of schemes against differential adversaries. Due to its prominence in the area and the recent optimization of its parameters, we prove the security of \(HFEv^-\) against differential adversaries. We investigate the newly suggested parameters and conclude that the proposed scheme is secure against all known attacks and against any differential adversary.
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Cartor, R., Gipson, R., Smith-Tone, D., Vates, J. (2016). On the Differential Security of the HFEv- Signature Primitive. In: Takagi, T. (eds) Post-Quantum Cryptography. PQCrypto 2016. Lecture Notes in Computer Science(), vol 9606. Springer, Cham. https://doi.org/10.1007/978-3-319-29360-8_11
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DOI: https://doi.org/10.1007/978-3-319-29360-8_11
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