ZKP学习笔记
ZK-Learning MOOC课程笔记
Lecture 8: FRI-based Polynomial Commitments and Fiat-Shamir (Justin Thaler)
8.2 FRI (Univariate) Polynomial Commitment
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Recall: Univariate Polynomial Commitments
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Initial Attempt from Lecture 4 (Merkle Tree)
- Fixing the first problem (Want P time linear in degree, not field size)
- Biger blowup factor -> more prover time, less verifier time, shorter proofs
- The key subset: roots of unity
- Example
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Fixing the second problem
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Merkle tree does not tell you any structure of the vertor at all
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The (interactive) low-degree test: Folding Phase
- Example
- Example
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The (interactive) low-degree test: Query Phase
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Back to the folding phase: more details
- The (interactive) low-degree test: Folding Phase
- The (interactive) low-degree test: Folding Phase
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Example
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The (interactive) low-degree test: Folding Phase
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Compare to Lecture 7