T sdh game eq
KZG.CommitmentScheme.t_sdh_game_eq
Plain-language statement
Transition 4: the mapped extended binding game is the t-SDH experiment.
Exact Lean statement
lemma t_sdh_game_eq {n : ℕ} {AuxState : Type} [SampleableType G₁]
(adversary : KzgBindingAdversary p G₁ G₂ n unifSpec AuxState) :
Pr[Groups.tSdhCondition (p := p) (g₁ := g₁) |
mapBindingToTsdh (p := p) (n := n) <$> bindingGameExt (g₁ := g₁) (g₂ := g₂)
AuxState adversary
(kzg (n := n) (g₁ := g₁) (g₂ := g₂) (pairing := pairing))]
= Groups.tSdhExperiment (g₁ := g₁) (g₂ := g₂) n
(bindingReduction (g₁ := g₁) (g₂ := g₂) (pairing := pairing) AuxState
adversary)Formal artifact
Lean source
lemma t_sdh_game_eq {n : ℕ} {AuxState : Type} [SampleableType G₁] (adversary : KzgBindingAdversary p G₁ G₂ n unifSpec AuxState) : Pr[Groups.tSdhCondition (p := p) (g₁ := g₁) | mapBindingToTsdh (p := p) (n := n) <$> bindingGameExt (g₁ := g₁) (g₂ := g₂) AuxState adversary (kzg (n := n) (g₁ := g₁) (g₂ := g₂) (pairing := pairing))] = Groups.tSdhExperiment (g₁ := g₁) (g₂ := g₂) n (bindingReduction (g₁ := g₁) (g₂ := g₂) (pairing := pairing) AuxState adversary) := by let scheme := kzg (n := n) (g₁ := g₁) (g₂ := g₂) (pairing := pairing) simp only [Groups.tSdhExperiment, Groups.tSdhGame] congr 1 let pSpec' : ProtocolSpec 1 := ⟨!v[.P_to_V], !v[G₁]⟩ let impl : QueryImpl _ (StateT unifSpec.QueryCache ProbComp) := QueryImpl.addLift (randomOracle : QueryImpl unifSpec (StateT unifSpec.QueryCache ProbComp)) (challengeQueryImpl (pSpec := pSpec')) dsimp only [bindingGameExt, bindingReduction, kzg, OptionT.mk, pSpec', impl, scheme, OptionT.run_map] convert OptionT.map_mk_bind_eq_of_body (sample := (Groups.sampleNonzeroZMod (p := p) : ProbComp (ZMod p))) (body₁ := fun τ => (simulateQ impl (do let srs := Groups.PowerSrs.generate (g₁ := g₁) (g₂ := g₂) n τ let ⟨cm, query, resp₁, resp₂, st₁, st₂⟩ ← liftComp (adversary.claim srs) _ let reduction := Reduction.mk (adversary.prover srs) (scheme.opening (srs, srs)).verifier let result₁ ← (reduction.run (cm, (⟨query, resp₁⟩ : (q : OracleInterface.Query (Fin (n + 1) → ZMod p)) × OracleInterface.Response q)) st₁).run let result₂ ← (reduction.run (cm, (⟨query, resp₂⟩ : (q : OracleInterface.Query (Fin (n + 1) → ZMod p)) × OracleInterface.Response q)) st₂).run let accept₁ := result₁.map (fun result => result.2) |>.getD false let accept₂ := result₂.map (fun result => result.2) |>.getD false let proof₁ : G₁ := result₁.map (fun result => result.1.1 0) |>.getD (1 : G₁) let proof₂ : G₁ := result₂.map (fun result => result.1.1 0) |>.getD (1 : G₁) pure (some (τ, srs, cm, query, resp₁, resp₂, accept₁, accept₂, proof₁, proof₂)))).run' (∅ : unifSpec.QueryCache)) (body₂ := fun τ => (simulateQ impl (do let srs := Groups.PowerSrs.generate (g₁ := g₁) (g₂ := g₂) n τ let ⟨cm, query, resp₁, resp₂, st₁, st₂⟩ ← liftComp (adversary.claim srs) _ let reduction := Reduction.mk (adversary.prover srs) (scheme.opening (srs, srs)).verifier let result₁ ← (reduction.run (cm, (⟨query, resp₁⟩ : (q : OracleInterface.Query (Fin (n + 1) → ZMod p)) × OracleInterface.Response q)) st₁).run let result₂ ← (reduction.run (cm, (⟨query, resp₂⟩ : (q : OracleInterface.Query (Fin (n + 1) → ZMod p)) × OracleInterface.Response q)) st₂).run let accept₁ := result₁.map (fun result => result.2) |>.getD false let accept₂ := result₂.map (fun result => result.2) |>.getD false let proof₁ : G₁ := result₁.map (fun result => result.1.1 0) |>.getD (1 : G₁) let proof₂ : G₁ := result₂.map (fun result => result.1.1 0) |>.getD (1 : G₁) pure (some (mapBindingInstanceToTsdh (p := p) (n := n) (srs, cm, query, resp₁, resp₂, accept₁, accept₂, proof₁, proof₂))))).run' (∅ : unifSpec.QueryCache)) (f := mapBindingToTsdh (p := p) (n := n)) (post := fun τ ((c, h) : ZMod p × G₁) => (τ, c, h)) (hBody := by intro τ dsimp only refine StateT.map_run'_eq_of_map_eq (∅ : unifSpec.QueryCache) ?_ simp only [simulateQ_bind, simulateQ_pure, map_eq_bind_pure_comp, bind_assoc] congr 1) using 1 <;> rfl- Project
- ArkLib
- License
- Apache-2.0
- Commit
- fad5cbf80877
- Source
- ArkLib/Commitments/Functional/KZG/Binding.lean:661-726
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Person-level attribution pending.
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Plain-language statement
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Person-level attribution pending.
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Plain-language statement
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Source project: ArkLib
Person-level attribution pending.