STELLAR · L1 · QRI 14 · BAND 1 Aware-Only Hybrid FAIL (no hybrid plan) · Stage 0 · Washing 0x

Stellar has the coordination to migrate and nothing to migrate to. The Stellar Development Foundation has shipped over 20 protocol upgrades and controls SCP cadence, but there is no PQ roadmap, no research output, and no hybrid plan. Remittance accounts hold long-lived Ed25519 signatures in dormant keys.

inLinkedIn XPost ▼Scorecard JSON ⇆Compare Verified 2026-04-17

Summary

Stellar is a classical-crypto L1 with no published PQC program. Ed25519 across accounts, SHA-256 hashing, SCP consensus. SDF is the coordination authority and has executed 20+ protocol upgrades, so migration capacity exists — but no PQ roadmap, no research output, no hybrid plan. Remittance focus means long-lived classical signatures in dormant accounts.

What the gates say

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

Burn-vs-rescue policy on file

none-announced

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 22 / 100

1a_primitive_inventory 10 / 20

Uniform Ed25519 signature scheme across accounts.

Primitives: Ed25519 (account signatures) · SHA-256 (hashing) · SCP (Stellar Consensus Protocol, quorum-based)

Evidence:

1b_shor_grover_pq_tag 6 / 20

1c_algorithm_family_diversity 2 / 20

Zero PQ family deployed. Single-family classical crypto.

1d_nist_security_category 2 / 20

No NIST PQC category deployed.

1e_implementation_quality 2 / 20

2 HNDL Exposure 22 / 100

2a_active_key_exposure 6 / 20

Ed25519 pubkeys exposed on first tx. Large exchange-held balances via federated hot wallets increase active surface.

2b_cold_key_exposure 5 / 20

~10 years old. SDF held 42.5% (later reduced) represents institutional dormant exposure.

2c_signature_longterm_validity 5 / 20

All historical Ed25519 signatures Shor-forgeable; no rotation primitive.

2d_encryption_confidentiality 6 / 20

Standard TLS; no PQC KEM in Horizon/peer protocol.

3 Metadata & Privacy Exposure 28 / 100

3a_tx_graph_visibility 6 / 20

Fully transparent ledger; payment memos often contain user identifiers (remittance use case).

3b_rpc_mempool_concentration 8 / 20

Horizon API concentration at SDF and a few providers.

3c_cross_chain_bridge_correlation 7 / 20

USDC issuance and anchor networks tie Stellar addresses to off-chain KYC.

3d_retroactive_deanon_risk 7 / 20

No shielded pools; retroactive risk is transparent-ledger inference.

4 Migration Architecture 32 / 100

4a_crypto_agility 10 / 20

Protocol version upgrades via SCP; no in-protocol signature-scheme switch primitive. Muxed accounts and Soroban are additive, not agility.

4b_account_abstraction_key_rotation 8 / 20

No AA. Multisig and weighted thresholds exist; Soroban smart contracts possible but not used as accounts.

4c_hard_fork_track_record 8 / 20

Regular protocol upgrades (20+). Predictable cadence; SDF-coordinated.

4d_hybrid_deployment_readiness 6 / 20

No published hybrid roadmap; no PQ signature-scheme preparation observed.

5 Deployment Execution 5 / 100

5a_mainnet_pqc_pct 0 / 20

Zero PQC on mainnet. Mosca cap triggers.

5b_pqc_code_in_client 1 / 20

No PQC code in stellar-core; no PQ research branch observed.

5c_validator_pqc_adoption 0 / 20

Zero PQ validators across SCP quorum.

5d_published_milestones_count 2 / 20

No published PQ milestones from SDF.

5e_pqc_washing_delta 2 / 20

No announcements; no washing.

6 Supply Chain Vendor Readiness 8 / 100

6a_wallet 2 / 20

6b_bridge 2 / 20

6c_custodian 2 / 20

6d_rpc_hsm 2 / 20

7 Governance & Coordination 42 / 100

7a_validator_stake_distribution 8 / 20

SCP quorum slices; Tier-1 nodes concentrated among SDF, SatoshiPay, LOBSTR, COINQVEST, Blockdaemon.

7b_upgrade_cadence_under_pressure 12 / 20

Regular protocol version bumps; SDF coordinates.

7c_named_coordination_lead 12 / 20

Named: Stellar Development Foundation (SDF), Denelle Dixon. Single dominant foundation.

7d_adversarial_coordination_precedent 10 / 20

No cryptographic emergency precedent; 2019 inflation event handled.

The X + Y vs Z inequality

X (data shelf life): 5-15 (Ed25519 static, no rotation)

Y (migration time): 5-10 (SDF-led protocol upgrade required)

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	10%	10%
arrives slowly post migration	55%	30%
arrives slowly mid migration	30%	15%

Peers in the L1 profile

Order-book view of the 9 chains closest to Stellar 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

Uniform Ed25519 signature scheme across accounts.

v1:chainscreen-v1-archive/data/chains/stellar.json

Supply chain snapshot

wallet Freighter · Lobstr · Ledger 0 PQC roadmaps

bridge Allbridge · Wormhole · SPL bridges 0 PQC roadmaps

custodian Coinbase Custody · BitGo · Anchorage 0 PQC roadmaps

rpc_hsm Horizon (SDF) · Blockdaemon · 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

Stage 0. Low washing ratio (honest silence). Gate failure: no hybrid plan. SDF governance coherence is the only positive signal. Typical L1 baseline.

Scorecard metadata

Profile: L1
Scored: 2026-04-17 by layerqu-v2-scoring-agent-5
v1 reference: chainscreen-v1-archive
QRI raw: 16 · after caps: 14
Confidence interval: ±5
PQC washing ratio: 0x
Burn-vs-rescue: none-announced

Caps triggered

mosca_cap_60 (5a=0)
sutor_cap_50 (zero milestones)