[Resource Topic] 2025/1054: Rewardable Naysayer Proofs

Welcome to the resource topic for 2025/1054

Title:
Rewardable Naysayer Proofs

Authors: Gennaro Avitabile, Luisa Siniscalchi, Ivan Visconti

Abstract:

Combining verifiable computation with optimistic approaches is a promising direction to scale blockchain applications.
The basic idea consists of saving computations by avoiding the verification of proofs unless there are complaints.

A key tool to design systems in the above direction has been recently proposed by Seres, Glaeser and Bonneau [FC’24] who formalized the concept of a Naysayer proof: an efficient to verify proof disproving a more demanding to verify original proof.

In this work, we discuss the need of rewarding naysayer provers, the risks deriving from front-running attacks, and the failures of generic approaches trying to defeat them.
Next, we introduce the concept of verifiable delayed naysayer proofs and show a construction leveraging proofs of sequential work, without relying on any additional infrastructure.

ePrint: https://eprint.iacr.org/2025/1054

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