{ "chain_slug": "polygon-zkevm", "name": "Polygon zkEVM", "scorecard_profile": "rollup-L2", "evaluated_at": "2026-04-18", "evaluator": "layerqu-v2-scoring-agent-4", "v1_reference": "chainscreen-v1-archive", "dimensions": { "1_cryptographic_exposure": { "weight": 0.12, "score": 30, "sub_scores": { "1a_primitive_inventory": { "score": 12, "primitives_named": [ "ECDSA secp256k1", "Keccak-256", "Groth16 over BN254/BLS12-381", "KZG polynomial commitments" ], "evidence": [ "Polygon zkEVM docs" ], "note": "zk-SNARK layer adds Groth16-KZG dependency." }, "1b_shor_grover_pq_tag": { "score": 14, "tags": { "ECDSA secp256k1": "Shor-break", "Groth16": "Shor-break (pairing-based)", "KZG": "Shor-break", "Keccak-256": "Grover-weaken" } }, "1c_algorithm_family_diversity": { "score": 0, "families_represented": 0, "families": [] }, "1d_nist_security_category": { "score": 0, "mappings": {} }, "1e_implementation_quality": { "score": 4, "formal_verification": "zkProver audited", "constant_time": "standard", "libraries": [ "Polygon zkEVM stack" ], "evidence": [ "l2beat.com/scaling/projects/polygonzkevm" ] } }, "total_artifacts": 1 }, "2_hndl_exposure": { "weight": 0.08, "score": 22, "sub_scores": { "2a_active_key": { "score": 4, "note": "EVM EOA — pubkey exposed." }, "2b_cold_key": { "score": 4, "note": "Same." }, "2c_sig_long_term": { "score": 7, "note": "Tx-once." }, "2d_encryption_conf": { "score": 7, "note": "Standard TLS." } }, "total_artifacts": 1 }, "3_metadata_privacy_exposure": { "weight": 0.08, "score": 22, "sub_scores": { "3a_graph_visibility": { "score": 5, "note": "Transparent." }, "3b_rpc_concentration": { "score": 6, "note": "Polygon Labs RPC concentration." }, "3c_bridge_correlation": { "score": 6, "note": "Native bridge." }, "3d_retroactive_deanon": { "score": 5, "note": "Groth16/KZG proofs rely on pairing-hard assumption. If Shor breaks pairings, future-validity challenged for historical proofs." } }, "total_artifacts": 1 }, "4_migration_architecture": { "weight": 0.15, "score": 25, "sub_scores": { "4a_crypto_agility": { "score": 5, "note": "zkEVM is being sunset (Polygon Labs announcement). Limited forward agility." }, "4b_aa_key_rotation": { "score": 10, "note": "Inherits ERC-4337 AA." }, "4c_hard_fork_track_record": { "score": 7, "note": "Multiple upgrades; sunset decision unilateral by Polygon Labs." }, "4d_hybrid_deployment_readiness": { "score": 3, "note": "Gated on Ethereum + sunset status." } }, "total_artifacts": 1 }, "5_deployment_execution": { "weight": 0.22, "score": 0, "sub_scores": { "5a_mainnet_pqc_pct": { "score": 0, "mainnet_pqc_pct": 0, "evidence": [] }, "5b_pqc_code_in_consensus": { "score": 0, "loc_or_bytes": 0 }, "5c_validator_pqc_keys": { "score": 0, "pct": 0 }, "5d_published_milestones": { "score": 0, "count": 0, "milestones": [] }, "5e_pqc_washing_delta": { "score": 0, "ratio": 1 } }, "total_artifacts": 0 }, "6_supply_chain_vendor_readiness": { "weight": 0.25, "score": 5, "sub_scores": { "6a_wallet": { "score": 2, "top3": [ "MetaMask", "Rabby", "Coinbase Wallet" ], "pqc_roadmap_count": 0 }, "6b_bridge": { "score": 1, "top3": [ "Polygon zkEVM Bridge", "LayerZero" ], "pqc_roadmap_count": 0 }, "6c_custodian": { "score": 1, "top3": [ "Coinbase Custody", "Fireblocks", "BitGo" ], "pqc_roadmap_count": 0 }, "6d_rpc_hsm": { "score": 1, "top3": [ "Alchemy", "Infura", "QuickNode" ], "pqc_roadmap_count": 0 } }, "total_artifacts": 1 }, "7_governance_coordination": { "weight": 0.1, "score": 30, "sub_scores": { "7a_validator_stake_distribution": { "score": 3, "note": "Single Polygon Labs sequencer." }, "7b_upgrade_cadence_under_pressure": { "score": 10, "note": "Sunset announcement coordinated." }, "7c_named_coordination_lead": { "score": 12, "note": "Polygon Labs." }, "7d_adversarial_coordination_precedent": { "score": 5, "note": "No PQC-specific." } }, "total_artifacts": 1 } }, "gates": { "hybrid_deployment": "FAIL", "evidence_reconstruction": "PASS", "primitive_naming": "PASS" }, "caps_applied": [ "Mosca (5a<20%)", "Sutor (5d=0 → Stage max 2)", "Preskill (multiple <3 artifacts → ×0.5)", "Casado (4 tiles pqc=0 → migration_stage max 3)", "Hybrid gate FAIL → QRI cap 60" ], "qri": { "raw": 10, "after_caps": 8, "ci_plus_minus": 15, "band": 1, "band_name": "Unaware" }, "migration_stage": 0, "mosca_inequality": { "X_signature_shelf_life_years": "5-10", "Y_migration_time_years_range": "10-15 (sunset)", "Z_10pct_year": 2036, "Z_50pct_year": 2041, "danger_zone_at_50pct": true }, "four_scenario_grid": { "quantum_never": { "value_preserved_pct": 100, "privacy_preserved_pct": 100 }, "arrives_suddenly_pre_migration": { "value_preserved_pct": 2, "privacy_preserved_pct": 10 }, "arrives_slowly_post_migration": { "value_preserved_pct": 75, "privacy_preserved_pct": 70 }, "arrives_slowly_mid_migration": { "value_preserved_pct": 25, "privacy_preserved_pct": 30 } }, "burn_vs_rescue_policy": "undeclared", "pqc_washing_ratio": 1, "vendor_tile_summary": { "wallet": { "top3": [ "MetaMask", "Rabby", "Coinbase Wallet" ], "pqc_roadmap_count": 0 }, "bridge": { "top3": [ "Polygon zkEVM Bridge", "LayerZero" ], "pqc_roadmap_count": 0 }, "custodian": { "top3": [ "Coinbase Custody", "Fireblocks", "BitGo" ], "pqc_roadmap_count": 0 }, "rpc_hsm": { "top3": [ "Alchemy", "Infura", "QuickNode" ], "pqc_roadmap_count": 0 } }, "narrative_summary": "Polygon zkEVM is Band 1 (Unaware) — being sunset by Polygon Labs (transition to CDK-Agglayer). Groth16-KZG zk-SNARK proofs rely on pairing-based cryptography which Shor breaks. Historical proofs lose retroactive soundness guarantees. No PQC research, no dated milestones.", "evaluator_notes": "Chain in effective sunset. Quantum risk is mostly moot — TVL is $30-50M and declining. Groth16/KZG retroactive risk is the notable technical concern: proofs verified today rest on a pairing-hard assumption that Shor breaks.", "narrative_voiced": "Polygon zkEVM is being sunset by its own team. Groth16-KZG proofs rest on pairing-hard assumptions that Shor breaks, so every historical proof loses retroactive soundness. The quantum question is moot here not because it was solved but because the chain was abandoned first." }