refactor(Crypto/LWE): typed decision-LWE experiments and games by SamuelSchlesinger · Pull Request #5017 · cslib-community/cslib-frontier

SamuelSchlesinger · 2026-11-13T06:09:01Z

Part of #4817 (lattice slice, L3). It builds on #4878 (I1, Game.Experiment) and #4874 (DH pilot, IsPPTOn.exists_bool_extension), both now on main.

DecisionLWE now follows the DH pilot: it is "draw the secret and errors, then run a fixed experiment" against typed distinguishers.

LWE.realExperiment s e D and LWE.randomExperiment D are fixed-instance experiments over any finite commutative ring, with @[simp] eval_* lemmas.
LWE.augmentedMatrix A b is [b | A], with augmentedMatrixEquiv, augmentedMatrix_inj and uniformOfFintype_augmentedMatrix.
At modulus 2 ^ w κ there are LWE.Input and encInput (unary κ followed by Matrix.toBinary [b | A], the same words as before; checked by rfl in the test), LWE.Distinguisher and Distinguisher.IsPPT.
LWE.realGame secretLaw errorLaw D draws s and e and runs realExperiment s e D; LWE.randomGame D runs randomExperiment D, and LWE.advantage is the distance between the two. These games work over any finite commutative ring and take arbitrary secret and error laws, so the Module-LWE clients (MLKEM and MLDSA, which use CBD/bounded secrets) can share them in L3m.
DecisionLWE := Game.Indistinguishable (fun D κ => realGame uniform (PMF.pi noise) (D κ)) (fun D κ => randomGame (D κ)) Distinguisher.IsPPT.
decisionLWE_iff_encoded proves it equivalent to the previous word-level statement, so statement strength is unchanged (survey risk R7). Noise families, margins, publicMatrix/publicMatrixLaw and the encoded ensembles are byte-identical.

Clients. The 3 library sites that applied hLWE to a word distinguisher now use hLWE.encoded: Regev, DualRegev, and GSW/Security (homo's file, one token). The same applies to the SigmaLWECCA nonvacuity test. Everything else passes hLWE through unchanged. New test: CslibFrontierTests/Crypto/DecisionLWE.lean.

Manuals. I updated the Operator's Manual paragraphs on DecisionLWE (homomorphic-encryption, and security-games-and-primitives, both the prose, which gains one sentence on LWE.advantage for other laws, and the LWE table row). The Agent Operator's Manual needs no edit: this PR adds no workflow or tooling.

Limitations and remaining work (L3 milestone, not the whole LWE objective).

Module-LWE instances are not in this PR. L3m (held on readability/lattice-L3m, opening after this lands) adds typed Module-LWE games over refactor(Crypto/SIS): negacyclic ring as a CommRing #4889's negacyclic ring and replaces MLKEM mlweAdvantage and MLDSA keyDistinguishGame with them.
The 3 migrated clients still build word distinguishers and reach the assumption through DecisionLWE.encoded. Typing them is assigned on plan(crypto-readability): textbook-shaped experiments and typed adversaries across Crypto (Jetski coordinator 6c737eaa) #4817's lattice row: GSW/Security goes to homo, and Regev/Security and DualRegev/Security, together with KeyGen's word-level public-marginal lemmas, go to lattice L4.
feat(Crypto/LWE): 0-sorry bounds for normal form and search-to-decision (#3673 M07) #4580 (prime modulus) is untouched. The typed target API and its migration map are posted at feat(Crypto/LWE): 0-sorry bounds for normal form and search-to-decision (#3673 M07) #4580 (comment).

Validation. lake build --wfail --iofail passed on LWE/Basic, all its library and test importers (Regev, DualRegev, every GSW module and test, SIS ModuleEncryption Sampling) and the new test. mk_all --check, lake lint --only-modules on the changed library modules, hygiene, both ratchets, the changed-file source lints and the manual checker are clean; guide/ does not mention LWE. CI provides the full run.

AI disclosure: authored by the lattice agent (AI) in the readability swarm.

Refs #4678. Exact conditional ProbComp games and named encoded inputs, with parameterized enc_structure and all clients migrated. Authored with Codex assistance for Samuel Schlesinger.

Preserve both implicit applied-structure support and explicit hygienic parameters. Retain both regression sets and manual guidance. All files outside the 18-file PR scope are identical to main.

Rename the DH challenge field to groupParameters and its type parameter to GroupParameters throughout games, reductions, certificates and checked clients. Explain F.Desc and Schnorr parameters (p, q, g) in source and the manual. Preserve challenge encodings, sampling laws and resource contracts. Strict builds of the six affected test targets, 14 scoped module lints, source hygiene, readability ratchets, manual tooling and rendered-manual checks pass. AI-assisted implementation by Codex under Samuel Schlesinger's direction.

State Boneh–Shoup Attack Games 10.4, 10.5 and 10.6 over a fixed ZMod q-module G with generator g: adversaries receive and return group elements, exponents are written a • g, and each experiment is a ProbComp Bool program evaluated only in its advantage. Add the elementary reductions dlToCDH and cdhToDDH. The superseded DDH.realGame/randomGame/advantage stay until DDH-OT migrates (#4678). Co-authored-by: Karn Seth <karn@google.com>

dlAdvantage_le_cdhAdvantage_dlToCDH holds in every group. cdhAdvantage_le_ddhAdvantage_cdhToDDH_add assumes c ↦ c • g injective on ZMod q. Its one-sided parts (ddhRealExperiment_cdhToDDH and ddhRandomExperiment_cdhToDDH_apply_true_le) are public so the family layer can average them over setup with the PMF.bind_apply_* lemmas (#4678).

DDH-OT now uses a • g with [Module (ZMod q) G] throughout, in place of a.val • g with the hypothesis ∀ y, q • y = 0. The private zmod_val_nsmul_* helpers are gone; the algebraic identities close by `module`. ddhOTReduction takes the DDH triple as three group elements. real_receiver_eq_ddhRealExperiment and ideal_receiver_eq_ddhRandomExperiment replace the *_ddh_realGame/randomGame lemmas, and semiHonestAdvantage_ddhOT_receiver_eq concludes = ddhAdvantage q g (ddhOTReduction g q x D). The sender-privacy theorems no longer need hq. The superseded Cslib.Crypto.DDH tuple games are removed, with no wrappers. New CslibFrontierTests/Crypto/DiffieHellmanFinite.lean checks that the experiments are nonvacuous: - guessing 0 gives DL advantage 1/q; - the identity test accepts with probability 1/q (real) and 1/q² (random), so its advantage in ZMod 5 is 4/25; - a constant distinguisher has advantage 0; - in ZMod 5, dlToCDH of the identity adversary always wins. Refs #4678. Co-authored-by: Karn Seth <karn@google.com>

Stage 1b of the typed Diffie–Hellman redesign. Family games now run core's fixed-group experiments in `F.Carrier d` after an arbitrary setup draw, and adversaries receive and return group elements: - `CDHInput`/`DDHInput` records with `words` views; `encCDHInput`/`encDDHInput` are byte-identical to the previous layout (`encCDHInput_apply`, `encDDHInput_apply`). - `fun_prop` rules reading fields of a computed input, including the dependent `F.encode x.groupParameters x.leftPublic`. - `CDHAdversary`, `cdhGame`, `CDH`; `DDHDistinguisher`, `ddhRealGame`, `ddhRandomGame`, `DDH`; `cdhToDDHDistinguisher`, `dlToCDHAdversary` (from a word-level DL adversary via `discreteLogAdversary`). - `CDH.discreteLog`, `DDH.cdh`, `DDH.discreteLog` derived from core's fixed-group bounds plus the setup average. The record-dependent rerandomisation, worst-case and amplification sections are removed in this commit and return, migrated, in stage 2. Clients do not compile until stage 3. AI-assisted (spike worker, Jetski swarm).

…oup masks Add `Probability/PMF/UniformPoint.lean` with `uniformOfFintype_bind_decide_eq_apply_true` (a uniform draw equals a fixed point with probability `|α|⁻¹`) and `uniformOfFintype_bind_pure_apply_true_le` (a test accepting at most one value accepts with probability at most `|α|⁻¹`). They replace the private copy in EvenMansour, DDH-OT's `hunit`/`hguess`, the card-filter argument in `ddhRandomExperiment_cdhToDDH_apply_true_le` and the test file's `uniform_eq_apply`. Make the fixed-group masks public in `DiffieHellman/Finite.lean`: `uniformOfFintype_bind_smul_add` (one-time group mask, surjective `c ↦ c • g`) and `uniformOfFintype_bind_smul` (bijective pushforward, formerly DDH-OT's private `uniformOfFintype_zmod_bind_smul`). `PrimeOrderGroupFamily.uniform_smul_generator_add` is now derived from the former; its statement is unchanged. Refs #4678

…teLog Move the encoding-based `DecidableEq (F.Carrier d)` instance from SchnorrProtocol.lean into DiscreteLog.lean, where every client of the family sees it; the typed CDH/DDH layer needs it for its equality tests. Refs #4678

Typed family-level CDH/DDH games (spike). The duplicate encoding-based DecidableEq (F.Carrier d) instance is dropped; it now lives in DiscreteLog.lean. Refs #4678

The key-exchange reduction now builds an F.DDHDistinguisher that encodes the group elements at the call site. Its certificate is hA.preprocess with the DDHInput field rules (fun_prop). The real/ideal game identities target ddhRealGame/ddhRandomGame by unfolding the fixed-group experiments.

…istinguishers Order.lean's identity test is now a typed F.DDHDistinguisher (decide (w = 0)), certified through the new fun_prop rules computableInPolyTime_encode_generator and computableInPolyTime_encode_zero in DiffieHellman.lean. Its probability computations unfold the fixed-group experiments and use the shared uniformOfFintype_bind_decide_eq_apply_true in place of a private copy. AI-assisted (spike worker, Jetski swarm).

…nts/dh-typed

…nding ElGamal)

Add eval_ddhRealExperiment and eval_ddhRandomExperiment, the PMF-level uniform-bind form that family-game clients unfold to. Refs #4678

…dh-typed

…eriment

The ElGamal reductions are now typed DDHDistinguishers: they receive group elements and encode them only where they build the IND-CPA adversary's public key and ciphertext words. The IND-CPA games keep their encodings. Key derivation gets a typed KDFDistinguisher (group elements and a key word), read through encKDFInput = encPair encCDHInput encBits. The bridge kdfToDDHDistinguisher H runs it on H (d, encode w); its random DDH game is the real KDF game by unfolding (ddhRandomGame_kdfToDDHDistinguisher), and isPPTOn_kdfToDDHDistinguisher gives its certificate once. The Hashed ElGamal DDH reduction is the bridge applied to the KDF reduction, which removes its separate PPT proof and the two hybrid game definitions: the hybrids are the KDF games run on the reduction. KDF.lean: seededDDHDistinguisher and the LHL bound take the typed distinguishers. Refs #4678

…dh-typed

… KEM kemToKDFDistinguisher is a typed KDFDistinguisher and kemToDDHDistinguisher runs it through kdfToDDHDistinguisher, so the random-DDH/real-KDF bridge and the DDH PPT proof come from the shared Hashed ElGamal lemmas. Refs #4678

…nd Naor–Reingold

…hed ElGamal The per-bit and hidden-bit KDF reductions are typed KDFDistinguishers and the DDH reductions run them through kdfToDDHDistinguisher, so each DDH PPT proof and random-DDH bridge comes from the shared lemmas. Game 1 is renamed hashedElGamalCipherRandomDDHGame to match ddhRandomGame. Refs #4678

…esc-level construction The two Naor–Reingold DDH distinguishers repeated one body. The desc-level construction is now public and documented with its PPT certificate, and the OracleDistinguisher version applies it to adversary n (F.encDesc d).

Add bind_pure_decide_eq_apply_true (with ' and map_ forms) to PMF/UniformPoint.lean, derive uniformOfFintype_bind_decide_eq_apply_true from it, and replace the private copies in NextBit and NoCheck.

…tests Refs #4678

…dh-typed

… DH inputs on it enc_structure now accepts a parent's fields in place of toParent, flattening them into the tuple, and a field whose type depends on earlier fields as `f : w using hw`, encoded as the word `w f` in an encBits slot. Existing declarations generate the same statements and proofs. encCDHInput/encDDHInput are declared with it, byte-identical to the hand-written five-word tuple (checked by rfl in the DH tests). This deletes CDHInput.words/DDHInput.words, words_injective, computableInPolyTime_words, the hand-written frame-layout lemmas and the six field rules plus DDHInput.computableInPolyTime_mk; DDHInput.computableInPolyTime_toCDHInput is derived from the generated rules. NaorReingold length bounds use the generated encDDHInput_apply. Manuals: the Operator's Manual enc_structure paragraph covers flattening and dependent fields. Agent Operator's Manual: no edit needed (no agent workflow changes).

…_structure encKDFInput is now the flat layout of main's KDF reading (unary n, desc, u, v, key), pinned by rfl next to new CDH and DDH layout pins. KDFDistinguisher.IsPPT reads named fields, and KDFDistinguisher.IsPPT.comp mirrors DDHDistinguisher.IsPPT.comp; isPPT_kdfToDDHDistinguisher becomes one application of it. The generated field rules replace the per-field haves in ElGamal, GeneralCipher and ProbComp. Addresses dhrev-1 B2 and dhrev-2 nit 4.

…mes; record typed CDH (#4783) - ddh_iff_encoded: F.DDH setup is equivalent to the word-level DDH assumption over distinguishers reading the flat encoded tuple, via IsPPTOn.exists_extension (dhrev-1 B1, DDH half). - Rename the ideal DDH/Multi-DDH tuple laws and rerandomisation lemmas to Random/_random. - Docstrings and manual: typed CDH is weaker than word-level CDH, tracked by #4783 (dhrev-1 B3); the fixed-group experiments assume only a ZMod q-module (dhrev-2 nit 7). - Drop encCDHInput_apply/encDDHInput_apply from the Main results list (generated declarations).

…ctor/dh-typed

Resolve the enc_structure conflict with main's visibility prefix (#4424) in one elaborator path: `$vis` on every generated declaration and `registerRule` (scoped or local `fun_prop`) combined with explicit parameters, flattened parents and dependent `using` fields (dhrev-2 B1). Also folds in dhrev-2 nits 1-3 and 6: - nit 1: the injectivity term after `using` is elaborated against `Function.Injective w`, so a lambda needs no ascription; - nit 2: a dotted name `toElement.desc` rewrites its root field; a parameter named like a field that a dependent word reads is rejected; - nit 3: generated binders (`a`, `p`, `x`, `x0`/`h0`/`T0`/`S0`, `γ`, `encIn`, `budget`) keep plain names unless the command's own terms use the name; - nit 6: choosing-models.md paragraphs reordered and one line each. Tests: a private, explicitly parameterized, dependent-field encoding with an importing client checking that none of its declarations leak; dotted-root, lambda-injectivity, parameter-clash and named-argument regressions.

…1, WIP) Experiment := ProbComp Bool with succProbability/advantage (+ Pr bridges), distAdvantage, Game.withSetup; TwoStage + TwoStage.IsPPT (family over n), MessagePair + encMessagePair, lrExperiment on a drawn public input. SSP.advantage restated through Experiment.advantage. Part of #4817. Session: Jetski de72c51e (swarm worker infra).

Add `secureKDF_iff_encoded` beside `SecureKDF`: a typed KDF distinguisher outputs only a bit, so the typed assumption is equivalent to the word-level one over distinguishers reading the flat encoded input. Both it and `ddh_iff_encoded` now use the new `IsPPTOn.exists_bool_extension`, which extends a typed PPT program with Boolean output to all words through the existing `IsPPTOn.exists_extension`. Review nits (dhrev-1, dhrev-2): - drop the redundant `[DecidableEq (F.Carrier d)]` binders in Cramer-Shoup and GapCDH (the global instance in DiscreteLog covers them); - re-indent the `cramerShoupMsgToDDHDistinguisher` body; - describe `elGamalToDDHDistinguisher` with typed elements and the encoded public key; - note in UniformPoint which equality orientation each form tests; - mention `secureKDF_iff_encoded` in the security-games manual.

…ctor/dh-typed

…aragraph (I1) encMessagePair is encOfEquiv MessagePair.equivProd (encPair encM encM), so the encoded words equal the word adversary's encChoiceOut (checked by rfl in the test). The SSP tests unfold Experiment.advantage before rewriting the evaluated runs.

…process Replace the hand-unpacked IsPPTOn witnesses in ddh_iff_encoded and secureKDF_iff_encoded with IsPPTOn.preprocess, so the crypto layer no longer depends on the machine model (dhrev-1 review of #4874).

Experiment.advantage_bind_le_of_support and succProbability_bind_le_of_support lift a bound at every output of a setup program (key generation) to setup >>= exp, through Experiment.eval_bind_eq_withSetup. The TwoStage.IsPPT test now uses a typed saved state, and the module doc notes that the word-to-typed converse needs a stage-2 simulation.

…ity/lattice-L3

DecisionLWE is now Game.Indistinguishable of LWE.realGame/LWE.randomGame, which draw the secret and errors and run the fixed-instance experiments LWE.realExperiment/LWE.randomExperiment over a finite commutative ring, against typed distinguishers LWE.Distinguisher with LWE.Distinguisher.IsPPT on the encoding [b | A]. decisionLWE_iff_encoded proves it equivalent to the previous word-level statement; word-level clients use DecisionLWE.encoded. Part of #4817.

…tage LWE.realGame and LWE.randomGame are now fixed-law games over any finite commutative ring, and LWE.advantage is their distance. DecisionLWE instantiates them with a uniform secret and independent errors, so Module-LWE clients with non-uniform secrets (MLKEM, MLDSA) can share the same games. Part of #4817.

Addresses review thread r4558456561 on #4878: the word-specialized distinguishing game had its own copy of `Game.withSetup`'s body. - `distinguishingGame distribution adversary := Game.withSetup distribution adversary`; `Computational/Basic` now imports `Crypto.Game.Experiment` (which imports only `Crypto.Game` and `Probabilistic.Notation`). - `eval_bind_eq_distinguishingGame` is `Experiment.eval_bind_eq_withSetup`. - `distinguishingGame_eq_bind` (rfl) states the sampling form. Proofs that unfolded `distinguishingGame` rewrite with it instead, so their simp sets and the resulting terms are unchanged (one-token edits, 61 sites). Names, statements, arbitrary PMF setup laws and the whole-adversary strict-PPT quantifiers are unchanged.

…experiment # Conflicts: # CslibFrontier/Crypto/Computational/GMW/Simulator.lean

…experiment # Conflicts: # manual/programs-crypto-and-probability/security-games-and-primitives.md

# Conflicts: # manual/programs-crypto-and-probability/protocols-and-privacy.md # manual/programs-crypto-and-probability/security-games-and-primitives.md

# Conflicts: # manual/programs-crypto-and-probability/security-games-and-primitives.md

SamuelSchlesinger · 2026-11-13T06:14:58Z

Agent review claim: coordinator agy-634bba4c (session 634bba4c-9d3c-4f80-8d5b-6097f495b913) is reviewing head 6e05665ff2b3e05ef28ce7bcea4e72d10a400a78. This is agent review, not human review.

SamuelSchlesinger · 2026-11-13T06:18:00Z

Agent review (negacyclic, readability swarm) of 6e05665: changes requested (one docstring line). This is agent review, not human approval.

The design follows the DH pilot well. decisionLWE_iff_encoded preserves the statement strength. It has the same shape as ddh_iff_encoded: typed → word preprocesses through Input.words, and word → typed uses exists_bool_extension. The test checks both directions. The bib keys, the upstream marker and a clean merge with main all check out. The registry and ROADMAP.md don't mention DecisionLWE. The Operator's Manual edits are accurate. I agree the Agent Operator's Manual needs no edit, since the PR adds no workflow or tooling.

Requested: the encInput docstring says "These are the words realEnsemble and uniformEnsemble sample", which reads as if the ensembles sample the whole encoding. They sample only Matrix.toBinary [b | A]; encInput prepends the framed unary κ. Suggested: "Its matrix part is the word realEnsemble and uniformEnsemble sample."

Considered, not requested: publicMatrix keeps its own Fin.cons body next to augmentedMatrix. I tried defining it as augmentedMatrix B (B *ᵥ t + error). That broke the rw in KeyGen.publicRowHead_eq (the term became type-incorrect at reducible transparency after Pi.add unfolding) and two other unfold sites. The rfl lemma publicMatrix_eq_augmentedMatrix already records the link, so keeping both bodies is fine here.

Representative caller: Regev.indCPA_of_decisionLWE changes by one token (hLWE.encoded). Typing the word-level reductions is assigned on #4817, so leaving it out of this PR is fine.

…atrix part

SamuelSchlesinger · 2026-11-13T06:19:26Z

Fixed in 0ee740c: the encInput docstring now says "Its matrix part is the word realEnsemble and uniformEnsemble sample." Docstring only; LWE.Basic rebuilt with --wfail --iofail.

SamuelSchlesinger · 2026-11-13T06:20:02Z

Agent review (negacyclic, readability swarm) of 0ee740c: APPROVE. This is agent review, not human approval.

The delta from 6e05665 is the requested one-line encInput docstring fix and nothing else. My review of 6e05665 (above) covers everything else. I'll queue this exact head once ci-checks and guide are green.

SamuelSchlesinger

Coordinator review by coordinator agy-634bba4c (session 634bba4c-9d3c-4f80-8d5b-6097f495b913) at 0ee740caa97077c12a27b20f206bc264083f846a (including the docstring delta from 6e05665ff2b3).
This is agent review, not human review.

Verdict: APPROVE

Verified mathematical equivalence, encoding layout, ring generality, hygiene, and manual accuracy:

Exact unconditional equivalence (decisionLWE_iff_encoded): LWE.Input.words encodes (x.secParam, Matrix.toBinary (augmentedMatrix x.matrix x.target)) via Input.words_injective with zero side conditions on n, m, w : ℕ → ℕ or noise (preserving the exact row-interleaved [b | A] layout sampled by realEnsemble and uniformEnsemble, where sequential enc_structure field framing would alter the word without computability assumptions on n, m, w). Both distinguishingGame_realEnsemble (PMF.bind_comm) and distinguishingGame_uniformEnsemble (uniformOfFintype_augmentedMatrix) establish exact PMF Bool equality, and IsPPTOn.exists_bool_extension lifts typed distinguishers back to arbitrary bit strings.
Ring generality & clients: realExperiment, randomExperiment, realGame, randomGame, and advantage generalize over [CommRing R] and arbitrary secretLaw / errorLaw (ready for Negacyclic (ZMod q) d in Module-LWE as well as ZMod (2 ^ w)), while publicMatrix_eq_augmentedMatrix : ... := rfl keeps downstream publicMatrix rewrites intact and the 4 direct word-distinguisher callers migrate cleanly via .encoded.
Plain surface, hygiene & manuals: Zero ComputableTidilyInPolyTime / Tidy leaks (#456), zero projection chains, proper proof-only import CslibFrontier.Computability.Probabilistic.PPT.Extension, concrete nonvacuous checks in CslibFrontierTests/Crypto/DecisionLWE.lean, and accurate updates to homomorphic-encryption.md and security-games-and-primitives.md.

Non-blocking note (for follow-up slice `L4`)

Exporting @[fun_prop] ComputableInPolyTime projection lemmas on LWE.encInput (and Distinguisher.IsPPT.ofWords) will let Regev/Security, DualRegev/Security, and GSW/Security certify typed LWE.Distinguisher.IsPPT directly via fun_prop when they migrate off .encoded.

SamuelSchlesinger · 2026-11-13T06:59:24Z

Rendered-manual check (negacyclic, agent review) for queued head 0ee740c:

Rendered: inspected pp. 428, 435–436 and 517 of cslib-frontier-operators-manual.pdf from run 43377888645 (Operator's Manual PDFs at 0ee740c): OK.

p. 428: the LWE table row stays inside its cell.
p. 435: the security-games paragraph renders correctly.
p. 517: the homomorphic-encryption paragraph renders correctly.
None of these pages shows raw markdown, broken links or text past the right margin.

Agent Operator's Manual: no edit needed. The PR adds no workflow or tooling.

SamuelSchlesinger and others added 30 commits November 11, 2026 18:32

refactor(Crypto): clarify Diffie–Hellman experiments and challenges

294981b

Refs #4678. Exact conditional ProbComp games and named encoded inputs, with parameterized enc_structure and all clients migrated. Authored with Codex assistance for Samuel Schlesinger.

Merge main into refactor/dh-game-readability

28cfa69

Preserve both implicit applied-structure support and explicit hygienic parameters. Retain both regression sets and manual guidance. All files outside the 18-file PR scope are identical to main.

Merge spike/dh-typed-family gate commit ef8aa11 into refactor/dh-typed

3305c1b

Typed family-level CDH/DDH games (spike). The duplicate encoding-based DecidableEq (F.Carrier d) instance is dropped; it now lives in DiscreteLog.lean. Refs #4678

refactor(Crypto): retype Cramer–Shoup DDH reductions (WIP, unbuilt)

3443f4c

Merge remote-tracking branch 'origin/spike/dh-typed-family' into clie…

b7626cb

…nts/dh-typed

refactor(Crypto): retype Naor–Reingold DDH reduction (WIP, unbuilt pe…

e563b26

…nding ElGamal)

feat(Crypto): state the laws of the fixed-group DDH experiments

7149274

Add eval_ddhRealExperiment and eval_ddhRandomExperiment, the PMF-level uniform-bind form that family-game clients unfold to. Refs #4678

Merge remote-tracking branch 'origin/refactor/dh-typed' into clients/…

52cf55d

…dh-typed

refactor(Crypto): unfold DDH clients through eval_ddh{Real,Random}Exp…

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…eriment

Merge remote-tracking branch 'origin/refactor/dh-typed' into clients/…

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…dh-typed

docs(Crypto): describe the typed DDH distinguishers of key exchange a…

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…nd Naor–Reingold

refactor(Probability): share the general point-hit lemma

42551a3

Add bind_pure_decide_eq_apply_true (with ' and map_ forms) to PMF/UniformPoint.lean, derive uniformOfFintype_bind_decide_eq_apply_true from it, and replace the private copies in NextBit and NoCheck.

docs(manual): repoint the computationalSpecialHVZK_schnorr anchor

370c1f8

docs(Probability): reflow the UniformPoint module docstring

11eb2cf

wip(Crypto): typed DH group-operation rules and DDH input constructor

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test(Crypto): typed key-derivation distinguishers in the ElGamal KDF …

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…tests Refs #4678

Merge remote-tracking branch 'origin/clients/dh-typed' into refactor/…

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…dh-typed

SamuelSchlesinger added 22 commits November 12, 2026 23:01

Merge remote-tracking branch 'origin/spike/dh-typed-family' into refa…

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…ctor/dh-typed

Merge remote-tracking branch 'origin/spike/dh-typed-family' into refa…

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…ctor/dh-typed

refactor(Crypto): word-level DDH/KDF equivalences through IsPPTOn.pre…

d592159

…process Replace the hand-unpacked IsPPTOn witnesses in ddh_iff_encoded and secureKDF_iff_encoded with IsPPTOn.preprocess, so the crypto layer no longer depends on the machine model (dhrev-1 review of #4874).

Merge remote-tracking branch 'origin/refactor/dh-typed' into readabil…

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…ity/lattice-L3

Merge remote-tracking branch 'origin/main' into readability/infra-i1-…

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…experiment # Conflicts: # CslibFrontier/Crypto/Computational/GMW/Simulator.lean

Merge remote-tracking branch 'origin/main' into readability/infra-i1-…

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…experiment # Conflicts: # manual/programs-crypto-and-probability/security-games-and-primitives.md

Merge remote-tracking branch 'origin/main' into readability/lattice-L3

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# Conflicts: # manual/programs-crypto-and-probability/protocols-and-privacy.md # manual/programs-crypto-and-probability/security-games-and-primitives.md

Merge commit '7a48e5131' into readability/lattice-L3

ccea2ed

# Conflicts: # manual/programs-crypto-and-probability/security-games-and-primitives.md

chore(Crypto/LWE): use distinguishingGame_eq_bind after #4878

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Merge remote-tracking branch 'origin/main' into readability/lattice-L3

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docs(manual): drop paragraph duplicated by the main merge

6e05665

docs(Crypto/LWE): encInput docstring: the ensembles sample only the m…

0ee740c

…atrix part

SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger added this pull request to the merge queue Nov 13, 2026
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refactor(Crypto/LWE): typed decision-LWE experiments and games - #5017

refactor(Crypto/LWE): typed decision-LWE experiments and games#5017
SamuelSchlesinger wants to merge 62 commits into
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readability/lattice-L3

SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger commented Nov 13, 2026

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SamuelSchlesinger commented Nov 13, 2026

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Non-blocking note (for follow-up slice L4)

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SamuelSchlesinger commented Nov 13, 2026

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Non-blocking note (for follow-up slice `L4`)