[Resource Topic] 2019/781: BBQ: Using AES in Picnic Signatures

Welcome to the resource topic for 2019/781

Title:
BBQ: Using AES in Picnic Signatures

Authors: Cyprien Delpech de Saint Guilhem, Lauren De Meyer, Emmanuela Orsini, Nigel P. Smart

Abstract:

This works studies the use of the AES block-cipher for Picnic-style signatures, which work in the multiparty-computation-in-the-head model. It applies advancements to arithmetic circuits for the computation of the AES S-box over multiparty computation in the preprocessing model to obtain an improvement of signature sizes of 40% on average compared to using binary circuits for AES-128, AES-192 and AES-256 in combination with previous techniques. This work also discusses other methods for the computation of the S-box and provides insights into the reaches and limits of the multiparty-computation-in-the-head paradigm.

ePrint: https://eprint.iacr.org/2019/781

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