{"id":"de77343c-531e-451f-9b5a-59ab94fc0115","arxiv_id":"2606.20760","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":0,"one_line_summary":"SDAS is formalized as a new primitive with Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding, instantiated as ZK-Compliance on Ethereum using a 14-constraint Circom circuit for sender-bound proofs with practical gas costs.","lead":"The paper introduces Selective Disclosure Authorization Schemes (SDAS) as a cryptographic primitive using zero-knowledge proofs to enable granular, revocable compliance checks on public ledgers while keeping underlying data private. Smart generalists might read it to see how blockchains could meet data protection regulations without losing their transparency guarantees.","discovery_kind":"new_method","skeptic_critique":{"model":"grok-4.3","headline":"Security model defines Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding but provides no proof that the 14-constraint circuit satisfies them against mempool adversaries","rationale":"The reader's weakest_assumption directly identifies the mitigation claim as the critical point, and the absence of any security argument or formal verification (explicitly noted as none) makes this the load-bearing gap. The performance numbers and small circuit size are concrete but do not address soundness of the new properties.","tokens_in":1808,"tokens_out":310,"duration_ms":28492,"concrete_test":"From the formal definitions in §3 (or equivalent), extract the exact winning condition for the Context-Aware Sender Binding game; simulate an adversary that generates a valid proof for address A, then submits it from address B via a different transaction; check whether the on-chain verifier accepts. If acceptance occurs, the binding property does not hold.","verdict_should_be":"CONDITIONAL","load_bearing_attack":"The central claim requires that the newly introduced properties suffice to bind proofs to their authorization context and prevent reuse/front-running. The abstract states that the model is defined and that the Circom circuit anchors the proof to the on-chain sender address, yet it contains no reduction, game-based argument, or even informal argument showing that the binding holds when an adversary can reorder or replay transactions in the public mempool. Without such a demonstration, the mitigation of the identified risks remains an unverified assumption rather than a consequence of the construction.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The paper formalizes Selective Disclosure Authorization Schemes (SDAS) as a cryptographic primitive enabling granular, revocable compliance checks on public ledgers via zero-knowledge proofs without revealing the witness. It introduces a security model with two new properties—Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding—to address front-running and proof-reuse risks arising from asynchronous off-chain proof generation and on-chain submission. The work presents an Ethereum instantiation (ZK-Compliance) using a 14-constraint Circom circuit that binds proofs to the on-chain sender address, along with a 'Grant, Verify, Revoke' lifecycle and Sepolia evaluation results showing sub-200ms browser proof generation and 240,512 gas verification cost.","tokens_in":1905,"tokens_out":513,"duration_ms":10879,"significance":"If the new security properties can be shown to hold for the construction, the framework would offer a targeted approach to reconciling ledger transparency with data-minimization requirements in regulated environments. The concrete instantiation and performance numbers indicate practical deployability on Ethereum, and the emphasis on sender binding directly targets a realistic adversarial setting in public mempools.","major_comments":[{"comment":"Abstract and security model section: The manuscript defines Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding to mitigate proof-reuse and front-running, yet provides no game-based definition, reduction, or even informal argument demonstrating that the 14-constraint Circom circuit satisfies these properties against a mempool adversary capable of reordering or replaying transactions. Without such an argument the central claim that the new properties adequately bind proofs to their authorization context remains unverified.","section":"Abstract / Security Model"},{"comment":"Implementation and evaluation section: The claim that the circuit 'anchors the zero-knowledge proof to the executing on-chain sender address' and thereby neutralizes reuse by different callers is stated without the circuit source, constraint details, or a security argument linking the 14 constraints to Context-Aware Sender Binding. This omission makes it impossible to assess whether the binding holds under the stated threat model.","section":"Implementation / Evaluation"}],"minor_comments":[{"comment":"The abstract refers to 'raw evaluation data' and 'circuit code' being omitted; including at least the circuit source or a link to a public repository would improve verifiability.","section":"Abstract"}],"recommendation":"major_revision","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for their careful review and constructive feedback. We address each major comment below, agreeing that additional details are required to fully substantiate the security claims.","responses":[{"response":"We agree that the security model would be strengthened by an explicit argument. The manuscript introduces the properties at a conceptual level but omits a game-based definition or informal reduction showing satisfaction by the circuit against a mempool adversary. In the revised manuscript we will add an informal security argument explaining how the sender address binding prevents proof reuse and front-running under the stated threat model; a game-based definition will be included if space allows or provided in an extended version.","revision_made":"yes","referee_comment":"[Abstract / Security Model] Abstract and security model section: The manuscript defines Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding to mitigate proof-reuse and front-running, yet provides no game-based definition, reduction, or even informal argument demonstrating that the 14-constraint Circom circuit satisfies these properties against a mempool adversary capable of reordering or replaying transactions. Without such an argument the central claim that the new properties adequately bind proofs to their authorization context remains unverified."},{"response":"We acknowledge the omission of detailed circuit information. The manuscript provides only a high-level description of the 14-constraint circuit. We will revise the implementation section (or add an appendix) to include the full constraint list, the mechanism by which the sender address is incorporated as a public input, and a direct link to Context-Aware Sender Binding, enabling assessment against the threat model.","revision_made":"yes","referee_comment":"[Implementation / Evaluation] Implementation and evaluation section: The claim that the circuit 'anchors the zero-knowledge proof to the executing on-chain sender address' and thereby neutralizes reuse by different callers is stated without the circuit source, constraint details, or a security argument linking the 14 constraints to Context-Aware Sender Binding. This omission makes it impossible to assess whether the binding holds under the stated threat model."}],"tokens_in":1470,"tokens_out":446,"duration_ms":32880,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The paper's main contribution is formalizing Selective Disclosure Authorization Schemes as a primitive for granular, revocable compliance checks on public ledgers, along with two new properties: Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding. It backs this with ZK-Compliance, an Ethereum instantiation using a tiny 14-constraint Circom circuit that ties the proof to the on-chain sender address, plus a Grant-Verify-Revoke flow and Sepolia numbers showing sub-200ms proof generation and 240k gas verification.\n\nThis is new in targeting the specific risks from asynchronous off-chain proof generation and public mempools, rather than generic ZKP applications. The practical circuit size and performance data are concrete and show attention to deployment constraints in regulated settings.\n\nThe soft spot is the missing security argument. The abstract defines the properties and claims the circuit neutralizes proof reuse, but there is no reduction, game, or even informal reasoning showing the binding holds when an adversary can reorder or replay transactions. A 14-constraint sender anchor may block naive reuse, yet without evidence it satisfies the stated model against realistic mempool threats, the central mitigation claim stays unverified.\n\nThis is for applied cryptographers and blockchain compliance researchers. Readers working on privacy-preserving ledgers could extract value from the definitions and the small circuit as a starting point. It shows honest engagement with the problem but the security gap is material.\n\nI would bring it to a reading group to talk through the new properties. I would not cite it as is. It deserves peer review if the authors supply the missing proofs or arguments.","headline":"SDAS formalizes a new primitive for ledger compliance with tailored security properties, but provides no argument that the 14-constraint circuit actually achieves Context-Aware Sender Binding against mempool adversaries.","tokens_in":2401,"tokens_out":410,"would_cite":false,"duration_ms":19804,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Selective Disclosure Authorization Schemes bind zero-knowledge proofs to specific ledger contexts and senders for revocable compliance without exposing private attributes.","keywords":["selective disclosure","zero-knowledge proofs","public ledgers","compliance","privacy","blockchain","cryptographic primitives","revocable authorization"],"falsifier":"A demonstration that one valid SDAS proof can be successfully submitted and accepted from a different on-chain sender address than the one it was generated for.","tokens_in":2662,"feed_emoji":"🔒","tokens_out":633,"duration_ms":21835,"temperature":0.7,"pith_summary":"Public ledgers create tension between required transparency and regulatory needs for data minimization. The work formalizes Selective Disclosure Authorization Schemes as a primitive that supports granular, revocable compliance verification while keeping the underlying witness hidden. New security definitions address risks from off-chain proof creation and on-chain submission by enforcing context binding and sender linkage. An Ethereum instantiation called ZK-Compliance realizes a grant-verify-revoke cycle using a small circuit and shows practical performance on testnet.","feed_headline":"New scheme binds ZK proofs to ledger senders to block reuse","feed_subtitle":"SDAS formalization adds context and sender binding so compliance proofs stay private and single-use on public ledgers.","key_machinery":"Selective Disclosure Authorization Schemes (SDAS) with the Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding properties, which bind proofs to authorization contexts and on-chain addresses.","core_discovery":"The paper formalizes Selective Disclosure Authorization Schemes (SDAS) as a cryptographic primitive enabling granular and revocable compliance checks on public ledgers without revealing the underlying witness. It introduces Ledger-Bound Attribute Unlinkability and Context-Aware Sender Binding to ensure valid proofs stay tied to their intended authorization context and executing sender. The ZK-Compliance construction on Ethereum operationalizes a user-controlled lifecycle with a 14-constraint circuit that anchors proofs to the on-chain sender address, achieving sub-200 ms browser generation and 240512 gas verification.","pith_inferences":["The binding mechanism could be adapted to other public ledger platforms that expose sender addresses in transactions.","Regulatory bodies might use similar schemes to audit ledger activity while respecting data minimization rules.","Further circuit optimizations could reduce verification costs even more for high-volume compliance use cases."],"forward_implications":["Compliance checks become possible on public ledgers without disclosing the private attributes being checked.","Proofs generated for one authorization cannot be reused by other parties due to sender and context binding.","Users retain control over granting, verifying, and revoking access through the defined lifecycle.","The construction runs with low enough gas cost and generation time to be usable in existing smart contract environments."],"fun_headline_variants":["SDAS adds sender binding to ZK proofs on Ethereum","14-constraint circuit ties ZK proofs to caller addresses","Revocable selective disclosure for privacy on public ledgers","ZK compliance proofs bound to on-chain senders via SDAS"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"The new security properties fully prevent proof reuse and front-running risks that arise when proofs are generated off-chain and later submitted on-chain.","fun_headline_variants_meta":{"raw":{"variants":["SDAS adds sender binding to ZK proofs on Ethereum","14-constraint circuit ties ZK proofs to caller addresses","Revocable selective disclosure for privacy on public ledgers","ZK compliance proofs bound to on-chain senders via SDAS"]},"model":"grok-4.3","cost_usd":0.009069,"raw_usage":{"total_tokens":4089,"prompt_tokens":708,"num_sources_used":0,"completion_tokens":66,"cost_in_usd_ticks":90687000,"prompt_tokens_details":{"text_tokens":708,"audio_tokens":0,"image_tokens":0,"cached_tokens":256},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":3315,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":708,"tokens_out":66,"duration_ms":33702,"temperature":1.0,"reasoning_tokens":3315,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-06-26T17:24:59.323026+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"A demonstration that one valid SDAS proof can be successfully submitted and accepted from a different on-chain sender address than the one it was generated for.","supporting_citations":[],"review_version":1}