SONEIUM · rollup-L2 · QRI 7 · BAND 1 Unaware Hybrid FAIL · Stage 0 · Washing 1x

Sony has a serious post-quantum posture in its consumer business. None of it transferred to Soneium. The chain is an OP Stack fork on ECDSA secp256k1 and BN254, operated by a single Sony sequencer, with Coinbase Custody and Fireblocks on the custody tile. Enterprise parent, retail-grade crypto.

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

Summary

Soneium is Band 1 (Unaware). Sony's OP Stack rollup launched Jan 2025. Enterprise-backed but inherits Ethereum ECDSA + BN254 unchanged. Sony's PQC posture in its broader consumer business does not transfer to chain layer. No PQC research or roadmap.

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

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 primitives inherited.

Primitives: ECDSA secp256k1 · Keccak-256 · BN254

Evidence: OP Stack docs

1b_shor_grover_pq_tag 12 / 20

1c_algorithm_family_diversity 0 / 20

1d_nist_security_category 0 / 20

1e_implementation_quality 6 / 20

Evidence: github.com

2 HNDL Exposure 22 / 100

2a_active_key 4 / 20

EVM EOA exposure.

2b_cold_key 4 / 20

Same.

2c_sig_long_term 7 / 20

Tx-once.

2d_encryption_conf 7 / 20

Standard.

3 Metadata & Privacy Exposure 18 / 100

3a_graph_visibility 4 / 20

Transparent.

3b_rpc_concentration 4 / 20

Sony-operated infra heavy.

3c_bridge_correlation 5 / 20

OP Stack native bridge.

3d_retroactive_deanon 5 / 20

Baseline.

4 Migration Architecture 20 / 100

4a_crypto_agility 5 / 20

Sony-controlled; OP Stack fork.

4b_aa_key_rotation 10 / 20

Inherits ERC-4337.

4c_hard_fork_track_record 3 / 20

Launched Jan 2025; minimal track record.

4d_hybrid_deployment_readiness 2 / 20

Not architected.

5 Deployment Execution 0 / 100

5a_mainnet_pqc_pct 0 / 20

5b_pqc_code_in_consensus 0 / 20

5c_validator_pqc_keys 0 / 20

5d_published_milestones 0 / 20

5e_pqc_washing_delta 0 / 20

6 Supply Chain Vendor Readiness 5 / 100

6a_wallet 2 / 20

6b_bridge 1 / 20

6c_custodian 1 / 20

6d_rpc_hsm 1 / 20

7 Governance & Coordination 30 / 100

7a_validator_stake_distribution 3 / 20

Single Sony sequencer.

7b_upgrade_cadence_under_pressure 8 / 20

New chain; limited track record.

7c_named_coordination_lead 15 / 20

Sony Block Solutions Labs + Startale.

7d_adversarial_coordination_precedent 4 / 20

None yet.

The X + Y vs Z inequality

X (data shelf life): 5-10

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	3%	10%
arrives slowly post migration	78%	70%
arrives slowly mid migration	25%	30%

Peers in the rollup-L2 profile

Order-book view of the 9 chains closest to Soneium 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 primitives inherited.

OP Stack docs

Cryptographic Exposure · 1e_implementation_quality

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

Supply chain snapshot

wallet MetaMask · Rabby · Startale wallet 0 PQC roadmaps

bridge OP Stack bridge · LayerZero 0 PQC roadmaps

custodian Coinbase Custody · Fireblocks · BitGo 0 PQC roadmaps

rpc_hsm Sony infra · Alchemy · Infura 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

Sony could be a fast PQC mover if compelled by Japanese CRYPTREC or similar policy — not yet. Centralized Sony-operated sequencer means rapid crypto swaps are technically feasible but politically unlikely without enterprise-sector pressure.

Scorecard metadata

Profile: rollup-L2
Scored: 2026-04-18 by layerqu-v2-scoring-agent-4
v1 reference: chainscreen-v1-archive
QRI raw: 9 · after caps: 7
Confidence interval: ±15
PQC washing ratio: 1x
Burn-vs-rescue: undeclared

Caps triggered

Mosca (5a<20%)
Sutor (5d=0)
Preskill (<3 artifacts → ×0.5)
Casado (4 tiles pqc=0)
Hybrid gate FAIL → QRI cap 60