Computer Science > Information Theory
[Submitted on 9 Nov 2020 (v1), last revised 25 Oct 2022 (this version, v4)]
Title:Interactive Oracle Proofs of Proximity to Algebraic Geometry Codes
View PDFAbstract:In this work, we initiate the study of proximity testing to Algebraic Geometry (AG) codes. An AG code $C = C(\mathcal{X}, \mathcal{P}, D)$ over an algebraic curve $\mathcal{X}$ is a vector space associated to evaluations on $\mathcal{P}$ of functions in the Riemann-Roch space $L_\mathcal{X}(D)$. The problem of testing proximity to an error-correcting code $C$ consists in distinguishing between the case where an input word, given as an oracle, belongs to $C$ and the one where it is far from every codeword of $C$. AG codes are good candidates to construct short proof systems, but there exists no efficient proximity tests for them. We aim to fill this gap.
We construct an Interactive Oracle Proof of Proximity (IOPP) for some families of AG codes by generalizing an IOPP for Reed-Solomon codes introduced by Ben-Sasson, Bentov, Horesh and Riabzev, known as the FRI protocol. We identify suitable requirements for designing efficient IOPP systems for AG codes. Our approach relies on a neat decomposition of the Riemann-Roch space of any invariant divisor under a group action on a curve into several explicit Riemann-Roch spaces on the quotient curve. We provide sufficient conditions on an AG code $C$ that allow to reduce a proximity testing problem for $C$ to a membership problem for a significantly smaller code $C'$.
As concrete instantiations, we study AG codes on Kummer curves and curves in the Hermitian tower. The latter can be defined over polylogarithmic-size alphabet. We specialize the generic AG-IOPP construction to reach linear prover running time and logarithmic verification on Kummer curves, and quasilinear prover time with polylogarithmic verification on the Hermitian tower.
Submission history
From: Jade Nardi [view email][v1] Mon, 9 Nov 2020 10:10:15 UTC (491 KB)
[v2] Tue, 17 Nov 2020 21:38:24 UTC (508 KB)
[v3] Tue, 16 Feb 2021 08:09:21 UTC (71 KB)
[v4] Tue, 25 Oct 2022 07:02:37 UTC (210 KB)
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