{
  "chain_slug": "taiko",
  "name": "Taiko",
  "scorecard_profile": "rollup-L2",
  "evaluated_at": "2026-04-17",
  "evaluator": "layerqu-v2-scoring-agent-5",
  "v1_reference": "chainscreen-v1-archive",
  "dimensions": {
    "1_cryptographic_exposure": {
      "weight": 0.15,
      "score": 24,
      "sub_scores": {
        "1a_primitive_inventory": {
          "score": 10,
          "primitives_named": [
            "ECDSA secp256k1 (inherited from Ethereum)",
            "Keccak-256",
            "BN254 (SNARK verification)",
            "Halo2/PLONK-style proofs (multi-prover)"
          ],
          "evidence": [
            "v1:chainscreen-v1-archive/data/chains/taiko.json"
          ],
          "note": "Based rollup Type-1: 100% Ethereum equivalence, inherits L1 primitives."
        },
        "1b_shor_grover_pq_tag": {
          "score": 6,
          "tags": {
            "ECDSA secp256k1": "Shor-break",
            "BN254": "Shor-break",
            "Halo2/PLONK": "Shor-break (pairing/EC)"
          },
          "evidence": []
        },
        "1c_algorithm_family_diversity": {
          "score": 2,
          "families_represented": 0,
          "families": [],
          "note": "All classical; no PQ family."
        },
        "1d_nist_security_category": {
          "score": 3,
          "mappings": {
            "ECDSA": "128-bit classical"
          },
          "evidence": []
        },
        "1e_implementation_quality": {
          "score": 3,
          "formal_verification": "multi-prover (SGX + ZK + guardian) redundancy is novel security feature",
          "constant_time": "standard",
          "libraries": [
            "taiko-geth",
            "taiko-client"
          ],
          "evidence": []
        }
      },
      "total_artifacts": 1
    },
    "2_hndl_exposure": {
      "weight": 0.1,
      "score": 20,
      "sub_scores": {
        "2a_active_key_exposure": {
          "score": 6,
          "note": "Ethereum EOAs inherited; secp256k1 pubkeys exposed on first tx."
        },
        "2b_cold_key_exposure": {
          "score": 5,
          "note": "Launched mainnet 2024; smaller dormant surface."
        },
        "2c_signature_longterm_validity": {
          "score": 4,
          "note": "Inherits Ethereum signature longevity risk; L2 does not add rotation."
        },
        "2d_encryption_confidentiality": {
          "score": 5,
          "note": "Standard TLS; no PQC KEM."
        }
      },
      "total_artifacts": 1
    },
    "3_metadata_privacy_exposure": {
      "weight": 0.1,
      "score": 22,
      "sub_scores": {
        "3a_tx_graph_visibility": {
          "score": 5,
          "note": "Transparent ledger."
        },
        "3b_rpc_mempool_concentration": {
          "score": 6,
          "note": "Based rollup: L1 proposers submit blocks, reducing sequencer concentration; RPC concentration at a few providers."
        },
        "3c_cross_chain_bridge_correlation": {
          "score": 6,
          "note": "Canonical Ethereum<->Taiko bridge, LayerZero."
        },
        "3d_retroactive_deanon_risk": {
          "score": 5,
          "note": "No shielded pools."
        }
      },
      "total_artifacts": 1
    },
    "4_migration_architecture": {
      "weight": 0.18,
      "score": 45,
      "sub_scores": {
        "4a_crypto_agility": {
          "score": 12,
          "note": "Type-1 equivalence: migration aligns with Ethereum; inherits ERC-4337/EIP-7702 AA path."
        },
        "4b_account_abstraction_key_rotation": {
          "score": 14,
          "note": "Same AA primitives as Ethereum; no L2-specific AA work."
        },
        "4c_hard_fork_track_record": {
          "score": 10,
          "note": "Ontake/Pacaya upgrades executed; coordinated with L1."
        },
        "4d_hybrid_deployment_readiness": {
          "score": 9,
          "note": "No L2-specific hybrid plan; dependency on Ethereum L1 migration."
        }
      },
      "total_artifacts": 1
    },
    "5_deployment_execution": {
      "weight": 0.22,
      "score": 5,
      "sub_scores": {
        "5a_mainnet_pqc_pct": {
          "score": 0,
          "mainnet_pqc_pct": 0,
          "evidence": [],
          "note": "Zero PQC on mainnet. Mosca cap triggers."
        },
        "5b_pqc_code_in_client": {
          "score": 1,
          "note": "No PQC code in taiko-geth or taiko-client."
        },
        "5c_validator_pqc_adoption": {
          "score": 0,
          "note": "Based rollup uses Ethereum proposers; no PQC validators."
        },
        "5d_published_milestones_count": {
          "score": 2,
          "count": 0,
          "note": "No PQ milestones."
        },
        "5e_pqc_washing_delta": {
          "score": 2,
          "ratio": 0,
          "note": "No claims, no washing."
        }
      },
      "total_artifacts": 1
    },
    "6_supply_chain_vendor_readiness": {
      "weight": 0.2,
      "score": 8,
      "sub_scores": {
        "6a_wallet": {
          "score": 2,
          "top3": [
            "MetaMask",
            "Rabby",
            "Ledger"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6b_bridge": {
          "score": 2,
          "top3": [
            "Taiko canonical",
            "Stargate",
            "Orbiter"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6c_custodian": {
          "score": 2,
          "top3": [
            "Coinbase Custody",
            "BitGo",
            "Anchorage"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6d_rpc_hsm": {
          "score": 2,
          "top3": [
            "Alchemy",
            "Infura",
            "QuickNode"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        }
      },
      "total_artifacts": 1
    },
    "7_governance_coordination": {
      "weight": 0.05,
      "score": 32,
      "sub_scores": {
        "7a_validator_stake_distribution": {
          "score": 6,
          "note": "Based rollup: Ethereum proposer set (permissionless); proving decentralized via multi-prover."
        },
        "7b_upgrade_cadence_under_pressure": {
          "score": 9,
          "note": "Two major upgrades Ontake/Pacaya; coordinated."
        },
        "7c_named_coordination_lead": {
          "score": 9,
          "note": "Named: Daniel Wang, Taiko Labs."
        },
        "7d_adversarial_coordination_precedent": {
          "score": 8,
          "note": "No adversarial precedent."
        }
      },
      "total_artifacts": 1
    }
  },
  "gates": {
    "hybrid_deployment": "FAIL (inherits Ethereum path only)",
    "evidence_reconstruction": "PASS",
    "primitive_naming": "PASS"
  },
  "caps_applied": [
    "mosca_cap_60 (5a=0)",
    "sutor_cap_50 (zero milestones)"
  ],
  "qri": {
    "raw": 18,
    "after_caps": 16,
    "ci_plus_minus": 5,
    "band": 1,
    "band_name": "Aware-Only"
  },
  "migration_stage": 0,
  "mosca_inequality": {
    "X_signature_shelf_life_years": "5-15 (inherited)",
    "Y_migration_time_years_range": "8-15 (gated by Ethereum L1 timeline)",
    "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": 12,
      "privacy_preserved_pct": 10
    },
    "arrives_slowly_post_migration": {
      "value_preserved_pct": 60,
      "privacy_preserved_pct": 30
    },
    "arrives_slowly_mid_migration": {
      "value_preserved_pct": 32,
      "privacy_preserved_pct": 15
    }
  },
  "burn_vs_rescue_policy": "none-announced; will inherit Ethereum policy",
  "pqc_washing_ratio": 0,
  "vendor_tile_summary": {
    "wallet": {
      "top3": [
        "MetaMask",
        "Rabby",
        "Ledger"
      ],
      "pqc_roadmap_count": 0
    },
    "bridge": {
      "top3": [
        "Taiko canonical",
        "Stargate",
        "Orbiter"
      ],
      "pqc_roadmap_count": 0
    },
    "custodian": {
      "top3": [
        "Coinbase Custody",
        "BitGo",
        "Anchorage"
      ],
      "pqc_roadmap_count": 0
    },
    "rpc_hsm": {
      "top3": [
        "Alchemy",
        "Infura",
        "QuickNode"
      ],
      "pqc_roadmap_count": 0
    }
  },
  "narrative_summary": "Taiko is a based, Type-1 equivalent rollup: by design it inherits Ethereum's crypto stack and migration timeline. Multi-prover (SGX + ZK + guardian) is a novel security posture but adds no PQ agility. No L2-specific PQ roadmap. Stage 0 baseline pinned to L1 dependency.",
  "evaluator_notes": "Stage 0. PQ posture is exactly Ethereum's: no better, no worse. Scorecard reflects 'inherits everything' posture.",
  "narrative_voiced": "Taiko's quantum posture is a copy of Ethereum's, and Taiko is honest about it. As a based, Type-1 equivalent rollup it inherits ECDSA secp256k1 and BN254 from L1 and has no independent PQ plan. The multi-prover scheme (SGX + ZK + guardian) is clever security, but none of it is post-quantum."
}