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Project-declaredLean 4.31.0

Advantage le module SIS

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.advantage_le_moduleSIS

Plain-language statement

Weak binding reduces to Module-SIS. The Hachi/Greyhound weak-binding advantage (over 𝓜(q, α)) is bounded by the sum of the inner and outer extracted Module-SIS advantages.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Inner commit eq of flatten eq

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.inner_commit_eq_of_flatten_eq

Plain-language statement

Equal flattened inner decompositions make verified inner messages collide.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Inner relation of verified

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.inner_relation_of_verified

Plain-language statement

Verified weak blocks with equal flattened inner decomps give a valid inner relation.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Outer relation of verified

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.outer_relation_of_verified

Plain-language statement

Verified weak openings with different flattened witnesses give a valid outer relation.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Output To Module SIS valid

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.outputToModuleSIS_valid

Plain-language statement

A successful pair of weak openings yields a valid inner or outer Module-SIS witness (over 𝓜(q, α)). The boolean-verification wrapper around outputToModuleSIS_valid_of_verified: it extracts the VerifiedOpening facts from verify_weak and applies the core.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Output To Module SIS valid of verified

ArkLib.Lattices.Ajtai.InnerOuter.WeakBinding.outputToModuleSIS_valid_of_verified

Plain-language statement

Extractor validity (the reusable core). Two verified weak openings that differ yield a valid inner or outer Module-SIS witness (over 𝓜(q, α)). This is stated directly on the extracted VerifiedOpening facts, independent of how those facts were obtained , so it is reused both by the weak-binding bound below (where the VerifiedOpenings come fr...

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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