# Stellar (XLM) Quantum Readiness Report > Stellar has a QRI score of 14/100 and is assessed at Stage 2 (Mitigation / Development) with medium evidence confidence. Evaluation date: 2026-06-10. Review status: draft. Evaluated scope: Native asset (XLM), Stellar Core protocol, Soroban smart contract platform, and X-Ray privacy system as deployed on mainnet. Stellar remains fully dependent on Ed25519 for all production-critical cryptographic operations as of June 10, 2026, with zero post-quantum protection live on mainnet. The Stellar Development Foundation published a comprehensive Quantum Preparedness Plan (QPP) on June 9, 2026 — one day before this evaluation — outlining a well-structured three-stage migration roadmap targeting ML-DSA integration via Soroban host functions in 2026 and native classic-account PQ signer support via CAP in 2027. The QPP demonstrates serious institutional engagement with quantum risk: it identifies specific NIST-standard algorithms (ML-DSA-44, ML-DSA-65), provides a credible staged timeline, correctly diagnoses both the account-takeover and consensus-compromise threat vectors, and acknowledges unsolved problems (BN254 pairing dependency, dormant accounts). Stellar's architectural separation of account identity from signing keys represents a genuine structural advantage — once PQ signer types exist, users can add quantum-safe signers without changing addresses or migrating balances. However, Stellar's address format (G... addresses) directly encodes Ed25519 public keys, meaning 100% of the ~33.7B XLM circulating supply (~$6.6B market cap) is in the long-exposure attack window today. SCP consensus authentication also remains Ed25519-only. The X-Ray privacy system adds a separate BN254 pairing-based vulnerability with no defined mitigation path. The base ledger's SHA-256 hash chain provides PQ-safe state integrity, earning partial credit in Production Cryptographic Protection. CAP-77 (Quorum Freeze), live since May 2026, provides a protocol-native emergency governance tool that could potentially be applied to quantum scenarios. With no PQ code, testnet, prototype, or mainnet deployment, the project is correctly staged at Stage 2 (Mitigation/Development). The QRI score of 14 reflects strong assessment and planning work capped by the complete absence of production PQ protection. ## Core resources - [Stellar QRI report](https://qrindex.org/projects/stellar/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes. - [Stellar structured report data](https://qrindex.org/projects/stellar/report.json): Complete report as JSON for deterministic machine processing. - [QRI methodology](https://qrindex.org/methodology/): Scoring model, evidence handling, readiness stages, confidence, assurance, and report status. - [All QRI project reports](https://qrindex.org/llms.txt): Score-ranked index of every published project assessment. - [Stellar official website](https://www.stellar.org/): Project-maintained website. - [Stellar source repository 1](https://github.com/stellar/stellar-core): Project source code referenced by QRI. - [Stellar source repository 2](https://github.com/stellar/js-stellar-sdk): Project source code referenced by QRI. - [Stellar source repository 3](https://github.com/stellar/go): Project source code referenced by QRI. - [Stellar source repository 4](https://github.com/stellar/stellar-protocol): Project source code referenced by QRI. ## Evidence sources - [Evidence source 1](): Public source cited by the Stellar QRI assessment. - [Evidence source 2](): Public source cited by the Stellar QRI assessment. - [Evidence source 3](): Public source cited by the Stellar QRI assessment. - [Evidence source 4](): Public source cited by the Stellar QRI assessment. - [Evidence source 5](): Public source cited by the Stellar QRI assessment. - [Evidence source 6](): Public source cited by the Stellar QRI assessment. - [Evidence source 7](): Public source cited by the Stellar QRI assessment. - [Evidence source 8](): Public source cited by the Stellar QRI assessment. - [Evidence source 9](): Public source cited by the Stellar QRI assessment. - [Evidence source 10](): Public source cited by the Stellar QRI assessment. - [Evidence source 11](): Public source cited by the Stellar QRI assessment. - [Evidence source 12](): Public source cited by the Stellar QRI assessment. - [Evidence source 13](): Public source cited by the Stellar QRI assessment. - [Evidence source 14](): Public source cited by the Stellar QRI assessment.