feat(Protocols): Sigma protocols and Schnorr identification#472
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ChristianoBraga wants to merge 2 commits intoleanprover:mainfrom
Open
feat(Protocols): Sigma protocols and Schnorr identification#472ChristianoBraga wants to merge 2 commits intoleanprover:mainfrom
ChristianoBraga wants to merge 2 commits intoleanprover:mainfrom
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Add Sigma protocol class (completeness, special soundness, SHVZK) and Schnorr's identification protocol as an instance.
- Promote `simulate` from existential to class field in SigmaProtocol - Add `nonDegenerate` field to prevent vacuous completeness proofs - Add TODO to move SchnorrHelpers near ZMod
chenson2018
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Apr 21, 2026
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chenson2018
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Similar to my comment on the other PR, can you please add a description of AI use? We don't have a hard-line stance against it, but it is helpful for us in reviewing, especially for a PR adding new definitions.
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Summary
SigmaProtocolclass capturing the three-move structure of Sigma protocols, with completeness, special soundness, and special honest-verifier zero-knowledge (SHVZK) as class fields.SigmaProtocol, over a cyclic group of prime order, with proofs of all three properties.New files
Cslib/Systems/Distributed/Protocols/Cryptographic/Sigma/Basic.lean— Sigma protocol classCslib/Systems/Distributed/Protocols/Cryptographic/Sigma/SchnorrId.lean— Schnorr instanceReferences
Test plan
lake buildpasses with no errors