POLYGON ZKEVM · rollup-L2 · QRI 8 · BAND 1 Unaware Hybrid FAIL · Stage 0 · Washing 1x

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.

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

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.

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 30 / 100

1a_primitive_inventory 12 / 20

zk-SNARK layer adds Groth16-KZG dependency.

Primitives: ECDSA secp256k1 · Keccak-256 · Groth16 over BN254/BLS12-381 · KZG polynomial commitments

Evidence: Polygon zkEVM docs

1b_shor_grover_pq_tag 14 / 20

1c_algorithm_family_diversity 0 / 20

1d_nist_security_category 0 / 20

1e_implementation_quality 4 / 20

Evidence: l2beat.com/scaling/projects/polygonzkevm

2 HNDL Exposure 22 / 100

2a_active_key 4 / 20

EVM EOA — pubkey exposed.

2b_cold_key 4 / 20

Same.

2c_sig_long_term 7 / 20

Tx-once.

2d_encryption_conf 7 / 20

Standard TLS.

3 Metadata & Privacy Exposure 22 / 100

3a_graph_visibility 5 / 20

Transparent.

3b_rpc_concentration 6 / 20

Polygon Labs RPC concentration.

3c_bridge_correlation 6 / 20

Native bridge.

3d_retroactive_deanon 5 / 20

Groth16/KZG proofs rely on pairing-hard assumption. If Shor breaks pairings, future-validity challenged for historical proofs.

4 Migration Architecture 25 / 100

4a_crypto_agility 5 / 20

zkEVM is being sunset (Polygon Labs announcement). Limited forward agility.

4b_aa_key_rotation 10 / 20

Inherits ERC-4337 AA.

4c_hard_fork_track_record 7 / 20

Multiple upgrades; sunset decision unilateral by Polygon Labs.

4d_hybrid_deployment_readiness 3 / 20

Gated on Ethereum + sunset status.

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 Polygon Labs sequencer.

7b_upgrade_cadence_under_pressure 10 / 20

Sunset announcement coordinated.

7c_named_coordination_lead 12 / 20

Polygon Labs.

7d_adversarial_coordination_precedent 5 / 20

No PQC-specific.

The X + Y vs Z inequality

X (data shelf life): 5-10

Y (migration time): 10-15 (sunset)

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	2%	10%
arrives slowly post migration	75%	70%
arrives slowly mid migration	25%	30%

Peers in the rollup-L2 profile

Order-book view of the 9 chains closest to Polygon zkEVM 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

zk-SNARK layer adds Groth16-KZG dependency.

Polygon zkEVM docs

Cryptographic Exposure · 1e_implementation_quality

l2beat.com/scaling/projects/polygonzkevm

Supply chain snapshot

wallet MetaMask · Rabby · Coinbase Wallet 0 PQC roadmaps

bridge Polygon zkEVM Bridge · LayerZero 0 PQC roadmaps

custodian Coinbase Custody · Fireblocks · BitGo 0 PQC roadmaps

rpc_hsm Alchemy · Infura · 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

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.

Scorecard metadata

Profile: rollup-L2
Scored: 2026-04-18 by layerqu-v2-scoring-agent-4
v1 reference: chainscreen-v1-archive
QRI raw: 10 · after caps: 8
Confidence interval: ±15
PQC washing ratio: 1x
Burn-vs-rescue: undeclared

Caps triggered

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