BASE · rollup-L2 · QRI 16 · BAND 2 Acknowledged Hybrid FAIL · Stage 0 · Washing 1x

Base is Coinbase's rollup, built on OP Stack, and its quantum plan is whatever Ethereum's plan turns out to be. The interesting asymmetry is that Coinbase Custody is one of the few custodians on this list with any PQC work, so the company behind the chain is ahead of the chain itself.

inLinkedIn XPost ▼Scorecard JSON ⇆Compare Verified 2026-04-18

Summary

Base is Coinbase's OP Stack rollup. Zero Base-specific PQC work; migration path depends on Ethereum L1 + OP Stack Superchain. Coinbase Smart Wallet (AA) and strong corporate incident response give good migration potential, but nothing shipped. Largest L2 by daily users.

What the gates say

Hybrid: FAIL. No hybrid plan on file.
Evidence: PASS. Sources reconstructable by third party.
Primitive naming: PASS. Named primitives at every scored sub-level.

Burn-vs-rescue policy on file

undeclared (dependent on Ethereum L1 policy)

Seven dimensions

Each dimension scores 0-100 internally; the weighted roll-up produces the QRI on the left. Open a row to read the sub-score detail.

1 Cryptographic Exposure 28 / 100

1a_primitive_inventory 10 / 20

OP Stack inheritance from Optimism. Ethereum primitives.

Primitives: ECDSA secp256k1 (inherited Ethereum) · Keccak-256 · BLS12-381 (Ethereum L1 settlement)

Evidence: docs.base.org

1b_shor_grover_pq_tag 12 / 20

Evidence: docs.base.org

1c_algorithm_family_diversity 0 / 20

No PQC families

1d_nist_security_category 0 / 20

No NIST PQC

1e_implementation_quality 6 / 20

Evidence: github.com

2 HNDL Exposure 20 / 100

2a_active_key_exposure 5 / 20

Coinbase-operated sequencer; large retail userbase (millions of wallets). EOA pubkeys exposed.

2b_cold_key_exposure 5 / 20

Mainnet since Aug 2023; young chain.

2c_signature_longterm_validity 5 / 20

ECDSA sigs + state commitments Shor-breakable.

2d_encryption_confidentiality 5 / 20

Standard TLS via Coinbase infra.

3 Metadata & Privacy Exposure 12 / 100

3a_tx_graph_visibility 3 / 20

Pseudonymous EVM transparent ledger.

3b_rpc_mempool_concentration 3 / 20

Coinbase-operated single sequencer. High concentration.

3c_cross_chain_bridge_correlation 3 / 20

Native Base Bridge visible on L1.

3d_retroactive_deanon_risk 3 / 20

No shielded pool.

4 Migration Architecture 48 / 100

4a_crypto_agility 12 / 20

OP Stack upgrade via Superchain governance; crypto swap requires coordination with OP Stack family.

4b_account_abstraction_key_rotation 15 / 20

Inherits ERC-4337, EIP-7702. Coinbase Smart Wallet uses AA.

4c_hard_fork_track_record 12 / 20

Multiple OP Stack upgrades (Fjord, Granite, Holocene) executed via Superchain.

4d_hybrid_deployment_readiness 9 / 20

Follows Ethereum L1 migration; no Base-specific hybrid path.

5 Deployment Execution 3 / 100

5a_mainnet_pqc_pct 0 / 20

no public artifact found

5b_pqc_code_in_client 0 / 20

no PQC in op-geth

5c_validator_pqc_adoption 0 / 20

Coinbase-operated sequencer; no PQC keys

5d_published_milestones_count 0 / 20

no PQC milestones

5e_pqc_washing_delta 3 / 20

No PQC announcements

6 Supply Chain Vendor Readiness 10 / 100

6a_wallet 3 / 20

6b_bridge 2 / 20

6c_custodian 3 / 20

6d_rpc_hsm 2 / 20

7 Governance & Coordination 58 / 100

7a_validator_stake_distribution 8 / 20

Centralized Coinbase sequencer. No validator set.

7b_upgrade_cadence_under_pressure 18 / 20

OP Stack Superchain upgrades executed smoothly. Coinbase security team mature.

7c_named_coordination_lead 18 / 20

Coinbase (Jesse Pollak, Base leader) + Optimism Collective Superchain.

7d_adversarial_coordination_precedent 14 / 20

Coinbase incident response experienced (parent company is public, security incidents handled).

The X + Y vs Z inequality

X (data shelf life): 5-10 (EOA with Smart Wallet AA allows rotation)

Y (migration time): 10-15

Z10 (10% CRQC year): 2036 · Z50 (50%): 2041

Verdict: X+Y > Z (danger).

Four-scenario grid

Scenario	Value preserved	Privacy preserved
quantum never	100%	100%
arrives suddenly pre migration	15%	5%
arrives slowly post migration	85%	70%
arrives slowly mid migration	50%	30%

Peers in the rollup-L2 profile

Order-book view of the 9 chains closest to Base by QRI.

Public artifacts used for this scorecard

Each entry below is a sub-score citation. Clicking the link takes you to the public source. A third party should be able to reconstruct every number on this page from these URLs in 48 hours.

Cryptographic Exposure · 1a_primitive_inventory

OP Stack inheritance from Optimism. Ethereum primitives.

https://docs.base.org

Cryptographic Exposure · 1b_shor_grover_pq_tag

https://docs.base.org

Cryptographic Exposure · 1e_implementation_quality

https://github.com/ethereum-optimism/optimism

Supply chain snapshot

wallet Coinbase Smart Wallet · MetaMask · Rabby 0 PQC roadmaps

bridge Native Base Bridge · Across · LayerZero 0 PQC roadmaps

custodian Coinbase Custody · BitGo · Fireblocks 0 PQC roadmaps

rpc_hsm Base RPC · Alchemy · QuickNode 0 PQC roadmaps

A chain's supply chain cannot migrate faster than its slowest dependency. Zero PQC roadmaps in any of the four categories is a structural blocker, not a lagging indicator.

Analyst notes on the scoring

Strong governance side (Coinbase + Superchain) potentially accelerates migration IF Ethereum ships PQC. Until then, Band 2 Acknowledged. Custodian tile has highest PQC-awareness potential (Coinbase Custody).

Scorecard metadata

Profile: rollup-L2
Scored: 2026-04-18 by layerqu-v2-scoring-agent-1
v1 reference: chainscreen-v1-archive
QRI raw: 16 · after caps: 16
Confidence interval: ±10
PQC washing ratio: 1x
Burn-vs-rescue: undeclared (dependent on Ethereum L1 policy)

Caps triggered

mosca_cap_60
sutor_stage_cap_2
casado_stage_cap_3
preskill_half_dim2_dim3_dim5_dim6
hybrid_gate_fail_cap_60