zkSync Era is the only L2 where signature choice is a contract-level decision because account abstraction is native from genesis. Combine that with the Boojum prover moving toward FRI-based commitments, and the migration tool is already sitting on mainnet. Shipped, unused.
Summary
zkSync Era has above-baseline PQ posture via two structural advantages: native account abstraction (signature scheme is a contract-level choice) and the Boojum prover transition toward hash-based FRI-style commitments. User signatures remain classical ECDSA but AA enables per-account migration. Behind Starknet on proof-system PQ-readiness (Boojum transition still in progress vs. Starknet's FRI already-shipped), but ahead of most L2s.
What the gates say
- Hybrid: COND. Boojum prover is partially PQ-path; user sig layer classical
- Evidence: PASS. Sources reconstructable by third party.
- Primitive naming: PASS. Named primitives at every scored sub-level.
Burn-vs-rescue policy on file
AA-rescue likely via per-account rotation; Boojum handles prover-side transition
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 34 / 100
Native AA from genesis; Boojum prover transitions toward FRI-based (PQ-safe proofs on roadmap but current Era still PLONK/BN254).
ECDSA secp256k1 (user signatures) · Keccak-256 + Poseidon (hashing) · Boojum (next-gen STARK-like prover with FRI-friendly commitments) · PLONK on BN254 (current prover)Current mainnet: no PQ family. Boojum roadmap introduces hash-based path.
2 HNDL Exposure 28 / 100
Native AA: per-account key migration possible; user keys inside smart accounts.
~3 years mainnet; moderate dormant.
Historical ECDSA sigs Shor-forgeable; AA enables rotation for new sigs.
TLS; no PQ KEM.
3 Metadata & Privacy Exposure 25 / 100
Transparent ledger.
Matter Labs sequencer (centralized).
Canonical bridge + LayerZero.
No shielded pools.
4 Migration Architecture 72 / 100
Native AA from genesis; Matter Labs has signature-scheme flexibility at the contract level. Boojum architecture allows prover swap without user changes.
Full AA: every account is a contract. Per-account signature validation means ML-DSA/Falcon can be added via verifier contracts. Among strongest AA in batch alongside Starknet.
Boojum migration (2024), PLONK to Boojum transition ongoing. Smooth execution.
Boojum is the transition path toward hash-based proofs. No shipped hybrid signature yet; structural readiness high.
5 Deployment Execution 22 / 100
Boojum's hash-based commitments are partially deployed (prover layer); user signature layer still classical. Partial credit.
era-boojum repo is shipped code; FRI-friendly primitives present. No ML-DSA signatures yet.
Matter Labs sequencer; proving infra upgraded.
Milestones: (1) Boojum transition published, (2) Era v24 prover upgrade.
Moderate: Boojum framed as 'post-quantum path' but consumer claim not overstated.
6 Supply Chain Vendor Readiness 8 / 100
7 Governance & Coordination 40 / 100
Centralized Matter Labs sequencer.
Boojum transition + Era upgrades coordinated.
Named: Alex Gluchowski, Matter Labs, zkSync Association.
No adversarial precedent.
The X + Y vs Z inequality
X (data shelf life): 3-8 (AA-rotatable)
Y (migration time): 2-5 (AA substrate + Boojum path)
Z10 (10% CRQC year): 2036 · Z50 (50%): 2041
Verdict: X+Y < Z (safe).
Four-scenario grid
| Scenario | Value preserved | Privacy preserved |
|---|---|---|
| quantum never | 100% | 100% |
| arrives suddenly pre migration | 30% | 20% |
| arrives slowly post migration | 75% | 45% |
| arrives slowly mid migration | 55% | 30% |
Peers in the rollup-L2 profile
Order-book view of the 9 chains closest to zkSync Era 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.
Native AA from genesis; Boojum prover transitions toward FRI-based (PQ-safe proofs on roadmap but current Era still PLONK/BN254).
Supply chain snapshot
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
Stage 1 (moving to 2 as Boojum completes). Second-strongest L2 PQ posture after Starknet. Boojum is a real PQ-path signal; FRI-friendly commitments reduce proof-layer PQ risk. AA gives migration tool.
Scorecard metadata
- Profile: rollup-L2
- Scored: 2026-04-17 by
layerqu-v2-scoring-agent-5 - v1 reference:
chainscreen-v1-archive - QRI raw: 38 · after caps: 34
- Confidence interval: ±6
- PQC washing ratio: 1.2x
- Burn-vs-rescue: AA-rescue likely via per-account rotation; Boojum handles prover-side transition
Caps triggered
- mosca_cap_60 (5a partial)
- aaronson_cap_partial (Boojum FRI components shipping)