Shorter and Faster Post-Quantum Designated-Verifier zkSNARKs from Lattices
Shorter and Faster Post-Quantum Designated-Verifier zkSNARKs from Lattices
复制标题
来自莱迪思的更短、更快的后量子指定验证者 zkSNARK
DOI:
10.1145/3460120.3484572
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Wu, David J.
中科院分区:
文献类型:
--
作者:
Ishai, Yuval;Su, Hang;Wu, David J.
Zero-knowledge succinct arguments of knowledge (zkSNARKs) enable efficient privacy-preserving proofs of membership for general NP languages. Our focus in this work is on post-quantum zkSNARKs, with a focus on minimizing proof size. Currently, there is a 1000x gap in the proof size between the best pre-quantum constructions and the best post-quantum ones. Here, we develop and implement new lattice-based zkSNARKs in the designated-verifier preprocessing model. With our construction, after an initial preprocessing step, a proof for an NP relation of size 2^20 is just over 16 KB. Our proofs are 10.3x shorter than previous post-quantum zkSNARKs for general NP languages. Compared to previous lattice-based zkSNARKs (also in the designated-verifier preprocessing model), we obtain a 42x reduction in proof size and a 60x reduction in the prover's running time, all while achieving a much higher level of soundness. Compared to the shortest pre-quantum zkSNARKs by Groth (Eurocrypt 2016), the proof size in our lattice-based construction is 131x longer, but both the prover and the verifier are faster (by 1.2x and 2.8x, respectively). Our construction follows the general blueprint of Bitansky et al. (TCC 2013) and Boneh et al. (Eurocrypt 2017) of combining a linear probabilistically checkable proof (linear PCP) together with a linear-only vector encryption scheme. We develop a concretely-efficient lattice-based instantiation of this compiler by considering quadratic extension fields of moderate characteristic and using linear-only vector encryption over rank-2 module lattices.
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DOI:
10.1145/3460120.3484767
发表时间:
2021-11
期刊:
Proceedings of the 2021 ACM SIGSAC Conference on Computer and Communications Security
影响因子:
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作者:
Jiaheng Zhang;Weijie Wang;Yinuo Zhang;Yupeng Zhang
通讯作者:
Jiaheng Zhang;Weijie Wang;Yinuo Zhang;Yupeng Zhang
DOI:
--
发表时间:
2021
期刊:
IACR Cryptology ePrint Archive
影响因子:
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作者:
A. Chiesa;E. Yogev
通讯作者:
E. Yogev
DOI:
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发表时间:
2012
期刊:
影响因子:
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作者:
S. Galbraith
通讯作者:
S. Galbraith
DOI:
--
发表时间:
2020-10
期刊:
IACR Cryptol. ePrint Arch.
影响因子:
--
作者:
Srinath T. V. Setty;Jonathan Lee
通讯作者:
Srinath T. V. Setty;Jonathan Lee
DOI:
--
发表时间:
2017
期刊:
International Conference on the Theory and Application of Cryptographic Techniques
影响因子:
--
作者:
D. Boneh;Yuval Ishai;A. Sahai;David J. Wu
通讯作者:
David J. Wu